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weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-environmental-issues/environmental-issues-waste-and-conservation-an-overview 2026-08-08T06:53:55.032Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-environmental-issues/people-s-movements-for-environmental-conservation-an-overview 2026-08-08T06:53:55.032Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-environmental-issues/q/3r-principle-1-explain-the-3r-principle-of-waste-management-reduce-reuse-and-recycle-giving-one-everyday-example-of-each-1fr86e 2026-08-08T06:53:55.032Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-environmental-issues/q/3r-principle-2-among-reduce-reuse-and-recycle-which-is-generally-considered-the-most-preferred-approach-and-why-1zh9xb 2026-08-08T06:53:55.032Z weekly 0.6 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https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-human-health-and-diseases/q/wbc-biology-2025-annual-q9-both-b-cells-and-t-cells-of-immune-system-are-produced-in-3515id 2026-08-12T03:56:15.183Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-human-health-and-diseases/summary 2026-08-08T06:19:45.394Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-human-health-and-diseases/types-of-immunity-active-and-passive 2026-08-08T06:19:45.394Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-human-health-and-diseases/vaccines-and-vaccination 2026-08-08T06:19:45.394Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-human-health-and-diseases/viral-diseases-common-cold-and-sars-covid-19 2026-08-08T06:19:45.394Z weekly 0.7 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https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/parasitism 2026-08-08T06:37:41.591Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/population-attributes-size-density-and-sex-ratio 2026-08-08T06:37:41.591Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/population-growth-exponential-and-logistic-growth-curves 2026-08-08T06:37:41.591Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/population-interactions-an-overview 2026-08-08T06:37:41.591Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/predation 2026-08-08T06:37:41.591Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/long-answer-1-with-the-help-of-a-suitably-described-graph-explain-the-difference-between-exponential-j-shaped-and-logist-arn98n 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/long-answer-2-describe-the-four-major-types-of-population-interactions-mutualism-competition-predation-and-parasitism-gi-p7c12b 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/long-answer-3-discuss-resource-partitioning-as-a-mechanism-that-allows-ecologically-similar-species-to-coexist-without-o-6hv322 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/long-answer-4-explain-how-population-attributes-such-as-birth-rate-death-rate-sex-ratio-and-age-distribution-together-de-ls48xd 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/long-answer-5-describe-the-various-adaptations-shown-by-parasites-for-a-parasitic-mode-of-life-5d6022 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/long-answer-6-with-the-help-of-the-verhulst-pearl-logistic-growth-equation-explain-how-the-rate-of-population-growth-slo-tghesn 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/long-answer-7-discuss-the-ecological-and-evolutionary-significance-of-predation-including-its-role-in-maintaining-specie-yb286f 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/long-answer-8-explain-the-concept-of-ecological-niche-distinguishing-between-the-fundamental-niche-and-the-realised-nich-6tyukl 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/mcq-1-the-sum-total-of-all-the-physical-chemical-and-biological-factors-that-surround-an-organism-along-with-the-specifi-usz5kq 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/mcq-2-in-the-association-seen-in-a-lichen-a-fungus-and-an-alga-cyanobacterium-living-together-the-interaction-is-best-cl-m16t2i 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/mcq-3-the-phenomenon-by-which-a-bird-such-as-the-koel-lays-its-eggs-in-the-nest-of-another-species-such-as-the-crow-whic-wptgss 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/mcq-4-which-growth-equation-is-represented-by-dn-dt-rn-k-n-k-a-exponential-growth-b-logistic-growth-c-linear-growth-d-no-v376k8 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/mcq-5-an-age-pyramid-with-a-broad-base-and-a-narrow-apex-showing-a-large-proportion-of-pre-reproductive-individuals-repr-xdojht 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/mcq-6-which-of-the-following-is-a-classic-laboratory-example-of-interspecific-competition-a-two-species-of-paramecium-p-ml7aii 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/mcq-7-the-number-of-individuals-of-a-species-present-per-unit-area-or-per-unit-volume-at-a-given-time-is-called-a-natali-1bj2yr 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/mcq-8-which-of-the-following-is-an-ectoparasite-commonly-found-on-humans-a-ascaris-roundworm-b-tapeworm-c-head-louse-ped-bugu5g 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/short-answer-1-differentiate-between-predation-and-parasitism-giving-one-example-of-each-m0yw2h 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/short-answer-10-draw-a-distinction-between-a-stable-and-a-declining-age-pyramid-in-terms-of-the-proportion-of-individual-7bi0kk 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/short-answer-2-explain-why-the-realised-niche-of-a-species-is-usually-narrower-than-its-fundamental-niche-un7oyy 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/short-answer-3-describe-the-lichen-as-an-example-of-an-obligate-mutualistic-association-naming-the-two-partners-involved-de6avb 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/short-answer-4-explain-gauses-competitive-exclusion-principle-with-reference-to-two-species-competing-for-an-identical-l-by7xcm 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/short-answer-5-list-any-four-adaptations-shown-by-predators-that-make-them-more-efficient-hunters-kiomm5 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/short-answer-6-list-any-four-adaptations-shown-by-prey-species-to-reduce-the-chance-of-being-caught-by-a-predator-f235tn 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/short-answer-7-distinguish-between-ectoparasites-and-endoparasites-giving-one-example-of-each-z2qlg6 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/short-answer-8-what-is-brood-parasitism-explain-with-the-example-of-the-koel-asian-koel-and-the-crow-oqsod2 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/short-answer-9-distinguish-between-natality-and-mortality-and-between-immigration-and-emigration-as-the-four-factors-tha-kpgsej 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/very-short-answer-1-define-environment-in-the-ecological-sense-naming-its-two-broad-components-ecu241 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/very-short-answer-2-distinguish-between-habitat-and-niche-in-one-sentence-each-a88q7d 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/very-short-answer-3-define-mutualism-and-give-one-example-of-a-mutualistic-pair-of-organisms-npa3m4 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/very-short-answer-4-state-gauses-competitive-exclusion-principle-in-one-sentence-b94r2p 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/very-short-answer-5-define-parasitism-and-name-one-example-of-an-ectoparasite-found-on-humans-ak179w 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/very-short-answer-6-what-is-meant-by-population-density-give-the-general-way-in-which-it-is-expressed-q5blpm 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/very-short-answer-7-define-natality-birth-rate-as-it-is-used-in-population-ecology-4u8ojy 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/very-short-answer-8-what-is-an-expanding-age-pyramid-and-what-shape-does-it-show-tqx6m5 2026-08-08T06:37:41.591Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/wbc-biology-2022-annual-q16-describe-xerophytic-adaptations-in-plants-presence-of-patagia-represents-which-type-of-adaptation-or-mention-the-sources-of-air-pollution-and-describe-b-5igeag 2026-08-12T03:56:03.991Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/wbc-biology-2022-annual-q30-the-overall-growth-curve-for-the-world-human-population-is-0n2zqd 2026-08-12T03:56:03.991Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/wbc-biology-2022-annual-q35-define-autecology-or-define-biome-hnldtt 2026-08-12T03:56:03.991Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/wbc-biology-2023-annual-q13-warm-and-humid-nature-is-characteristic-of-which-one-of-the-following-flq6ol 2026-08-12T03:56:08.079Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/wbc-biology-2023-annual-q23-what-do-you-mean-by-parasitism-mention-one-parasitic-adaptation-1-1-or-mention-how-ozone-layer-is-depleted-in-the-atmosphere-sq1y5a 2026-08-12T03:56:08.079Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/wbc-biology-2024-annual-q14-characteristics-of-xerophytic-plants-are-1yac5p 2026-08-12T03:56:11.623Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/q/wbc-biology-2025-annual-q32-what-are-the-differences-between-habitat-and-niche-what-is-mycorrhiza-2-1-or-what-are-the-differences-between-s-and-j-shaped-growth-what-was-the-primary-mc3acx 2026-08-12T03:56:15.183Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-organisms-and-populations/summary 2026-08-08T06:37:41.591Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-principles-of-inheritance-and-variation 2026-08-08T06:01:01.607Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-principles-of-inheritance-and-variation/chromosomal-disorders 2026-08-08T06:01:01.607Z weekly 0.7 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weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-principles-of-inheritance-and-variation/monohybrid-cross-and-the-law-of-dominance 2026-08-08T06:01:01.607Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-principles-of-inheritance-and-variation/pedigree-analysis 2026-08-08T06:01:01.607Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-principles-of-inheritance-and-variation/pleiotropy 2026-08-08T06:01:01.607Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/biology/wb-bio-principles-of-inheritance-and-variation/polygenic-inheritance 2026-08-08T06:01:01.607Z weekly 0.7 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weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/chemistry/wb-chem-aldehydes-ketones-and-carboxylic-acids 2026-08-08T16:16:00.275Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/chemistry/wb-chem-aldehydes-ketones-and-carboxylic-acids/acidic-nature-of-carboxylic-acids 2026-08-08T16:16:00.275Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/chemistry/wb-chem-aldehydes-ketones-and-carboxylic-acids/cannizzaro-reaction 2026-08-08T16:16:00.275Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/chemistry/wb-chem-aldehydes-ketones-and-carboxylic-acids/haloform-reaction 2026-08-08T16:16:00.275Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/chemistry/wb-chem-aldehydes-ketones-and-carboxylic-acids/important-nucleophilic-addition-reactions 2026-08-08T16:16:00.275Z weekly 0.7 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https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/mathematics/wb-math-determinants/q/example-1-evaluate-the-determinant-begin-vmatrix-3-1-2-4-end-vmatrix-nwjirh 2026-08-08T11:20:22.491Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/mathematics/wb-math-determinants/q/example-2-evaluate-begin-vmatrix-2-3-1-0-1-4-5-2-3-end-vmatrix-by-expanding-along-the-first-row-2ewo5t 2026-08-08T11:20:22.491Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/mathematics/wb-math-determinants/q/example-3-using-properties-of-determinants-evaluate-begin-vmatrix-101-102-103-104-105-106-107-108-109-end-vmatrix-withou-fg2jhm 2026-08-08T11:20:22.491Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/mathematics/wb-math-determinants/q/example-4-write-the-minors-and-cofactors-of-the-elements-of-the-first-row-of-begin-vmatrix-2-3-5-6-0-4-1-5-7-end-vmatrix-nbi923 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https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/mathematics/wb-math-determinants/q/exercise-area-of-a-triangle-2-find-the-value-s-of-k-if-the-area-of-the-triangle-with-vertices-k-0-4-0-0-2-is-4-square-un-y2l1te 2026-08-08T11:20:22.491Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/mathematics/wb-math-determinants/q/exercise-area-of-a-triangle-3-using-determinants-show-that-the-points-a-b-c-b-c-a-c-a-b-are-collinear-swdqp5 2026-08-08T11:20:22.491Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/mathematics/wb-math-determinants/q/exercise-determinant-of-2-2-and-3-3-matrices-1-evaluate-begin-vmatrix-5-2-3-4-end-vmatrix-tge9gs 2026-08-08T11:20:22.491Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/mathematics/wb-math-determinants/q/exercise-determinant-of-2-2-and-3-3-matrices-2-evaluate-begin-vmatrix-0-1-1-0-end-vmatrix-kpu862 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https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electromagnetic-induction/q/exercise-1-a-straight-conducting-rod-of-length-l-slides-with-a-uniform-velocity-v-along-two-parallel-rails-in-a-region-o-66mj85 2026-08-08T18:58:05.330Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electromagnetic-induction/q/exercise-2-a-plane-loop-of-area-a-is-placed-in-a-uniform-magnetic-field-b-such-that-the-normal-to-the-loop-makes-an-angl-mehwr9 2026-08-08T18:58:05.330Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electromagnetic-induction/q/exercise-3-a-bar-magnet-is-moved-with-its-north-pole-leading-towards-a-stationary-closed-circular-coil-along-the-coils-a-dno395 2026-08-08T18:58:05.330Z weekly 0.6 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https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/the-nor-gate 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/the-not-gate 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/the-or-gate 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/the-triode-valve 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/the-vacuum-diode 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/thermal-emission-of-electrons 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/transistor-action 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/transistor-as-a-switch 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/transistor-as-an-amplifier-common-emitter-configuration 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/transistor-characteristics-in-common-emitter-configuration 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/zener-diode-as-a-voltage-regulator 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electronic-devices/zener-diode-structure-and-breakdown 2026-08-08T19:46:09.829Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/capacitance-of-spherical-capacitors-solid-and-hollow 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/capacitors-and-capacitance 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/capacitors-in-everyday-life 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/capacitors-in-parallel 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/capacitors-in-series 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/combination-of-capacitors 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/conductors-and-insulators-free-and-bound-charges 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/dielectrics-and-electric-polarization 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/electric-potential-and-potential-difference 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/electric-potential-due-to-a-point-charge 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/electric-potential-due-to-a-system-of-point-charges 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/electric-potential-due-to-an-electric-dipole 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/electrostatic-potential-energy-of-a-system-of-two-point-charges 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/energy-stored-in-a-capacitor 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/equipotential-surfaces-and-their-properties 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/introduction 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/potential-energy-of-an-electric-dipole-in-an-external-field 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/example-1-define-electric-potential-at-a-point-in-an-electrostatic-field-and-state-its-si-unit-owkjbg 2026-08-08T18:38:05.336Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/example-2-the-potential-difference-between-two-points-a-and-b-is-12-text-v-find-the-work-done-in-moving-a-charge-of-2-mu-foa7qg 2026-08-08T18:38:05.336Z weekly 0.6 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https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/exercise-3-explain-why-the-electric-field-inside-a-conductor-in-electrostatic-equilibrium-is-always-zero-and-why-the-ent-3mpifc 2026-08-08T18:38:05.336Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/exercise-4-explain-the-difference-between-a-polar-and-a-nonpolar-molecule-and-describe-briefly-how-each-responds-when-a-ctz7ca 2026-08-08T18:38:05.336Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/exercise-5-derive-an-expression-for-the-equivalent-capacitance-of-a-number-of-capacitors-connected-in-series-arnfex 2026-08-08T18:38:05.336Z weekly 0.6 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2026-08-12T03:57:31.836Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/wbc-physics-2022-annual-q29-a-spherical-liquid-drop-has-a-capacitance-of-1-f-it-breaks-to-form-eight-drops-of-the-same-radius-the-capacitance-of-each-drop-is-lnmedq 2026-08-12T03:57:31.836Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/wbc-physics-2022-annual-q7-deduce-the-expression-for-the-potential-energy-of-a-system-of-two-point-charges-q1-and-q2-brought-from-infinity-to-the-points-with-positions-r1-and-r2-re-4mzl1z 2026-08-12T03:57:31.836Z weekly 0.6 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https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/wbc-physics-2024-annual-q1-a-charge-of-100-c-is-placed-at-the-centre-of-a-circle-of-radius-5-m-work-done-in-moving-a-unit-positive-charge-around-the-circumference-of-the-circle-onc-woerk2 2026-08-12T03:57:38.820Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/wbc-physics-2024-annual-q2-the-capacity-of-a-condenser-is-2-10-f-and-its-potential-is-200-v-the-energy-released-on-discharging-it-fully-will-be-ddwxcx 2026-08-12T03:57:38.820Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/wbc-physics-2024-annual-q25-a-what-are-the-factors-on-which-capacitance-of-a-capacitor-depends-1-b-three-capacitors-of-different-values-are-connected-in-series-determine-their-equi-7jg53i 2026-08-12T03:57:38.820Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/wbc-physics-2025-annual-q2-the-angle-between-the-electric-lines-of-force-and-the-equipotential-surface-is-rwl9nd 2026-08-12T03:57:44.269Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/q/wbc-physics-2025-annual-q25-a-what-is-dielectric-constant-b-a-dielectric-slab-of-thickness-t-and-dielectric-constant-k-is-kept-between-the-plates-of-a-parallel-plate-capacitor-with-9pbvqj 2026-08-12T03:57:44.269Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/relation-between-electric-field-intensity-and-potential 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/summary 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-electrostatic-potential-and-capacitance/the-parallel-plate-capacitor-with-and-without-a-dielectric 2026-08-08T18:38:05.336Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-magnetism-and-matter 2026-08-08T18:57:50.184Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-magnetism-and-matter/current-loop-as-a-magnetic-dipole 2026-08-08T18:57:50.184Z weekly 0.7 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https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-moving-charges-and-magnetism/lorentz-force-force-on-a-moving-charge-in-electric-and-magnetic-fields 2026-08-08T18:57:34.139Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-moving-charges-and-magnetism/magnetic-field-at-the-centre-and-on-the-axis-of-a-circular-current-loop 2026-08-08T18:57:34.139Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-moving-charges-and-magnetism/magnetic-field-due-to-a-straight-current-carrying-conductor 2026-08-08T18:57:34.139Z weekly 0.7 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-moving-charges-and-magnetism/magnetic-field-of-a-straight-solenoid 2026-08-08T18:57:34.139Z weekly 0.7 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https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/exercise-4-explain-what-is-meant-by-the-magnifying-power-of-a-simple-microscope-magnifying-glass-and-derive-the-expressi-q5ioxc 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/exercise-5-a-ray-of-light-incident-on-one-face-of-an-equilateral-glass-prism-refracting-angle-a-60-circ-suffers-minimum-rblw52 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/exercise-6-using-the-idea-of-rayleigh-scattering-explain-why-the-clear-daytime-sky-looks-blue-and-why-the-sun-looks-redd-rcfzze 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/exercise-7-describe-the-process-of-accommodation-of-the-human-eye-and-define-the-near-point-and-the-far-point-of-a-norma-4wasxk 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/exercise-8-a-person-suffering-from-myopia-cannot-see-distant-objects-clearly-and-has-a-far-point-of-only-2-text-m-find-t-or23nn 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/exercise-9-a-person-suffering-from-hypermetropia-cannot-focus-on-objects-closer-than-1-text-m-his-near-point-has-shifted-qt26n6 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/numerical-1-a-concave-mirror-forms-a-real-image-three-times-the-size-of-the-object-of-an-object-placed-20-text-cm-in-fro-qd6p1r 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/numerical-10-a-refracting-astronomical-telescope-has-an-objective-of-focal-length-100-text-cm-and-an-eyepiece-of-focal-l-jqda6h 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/numerical-2-an-object-5-text-cm-tall-is-placed-30-text-cm-in-front-of-a-convex-mirror-of-focal-length-20-text-cm-find-th-jh6l3k 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/numerical-3-a-convex-lens-of-focal-length-10-text-cm-forms-a-real-image-twice-the-size-of-the-object-find-the-object-dis-r6j29k 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/numerical-4-two-thin-lenses-of-focal-lengths-12-text-cm-and-20-text-cm-are-placed-in-contact-calculate-the-focal-length-jxgz8s 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/numerical-5-an-equiconvex-lens-radii-of-curvature-equal-in-magnitude-r-1-20-text-cm-r-2-20-text-cm-has-a-focal-length-of-u8utsw 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/numerical-6-a-thin-prism-of-refracting-angle-5-circ-made-of-glass-of-refractive-index-1-52-is-used-to-produce-a-small-an-ai8hgs 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/numerical-7-in-a-displacement-method-experiment-a-convex-lens-is-moved-between-a-fixed-object-and-a-screen-kept-90-text-4giwql 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/numerical-8-a-simple-magnifying-glass-of-focal-length-5-text-cm-is-used-by-a-person-whose-near-point-is-at-25-text-cm-wi-zwq4gn 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/numerical-9-a-compound-microscope-has-an-objective-of-focal-length-1-5-text-cm-and-an-eyepiece-of-focal-length-5-text-cm-24osy6 2026-08-08T19:17:18.393Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/wbc-physics-2016-annual-q17-a-state-huygens-principle-for-propagation-of-light-wave-b-show-with-the-help-of-a-ray-diagram-how-the-image-is-formed-in-an-astronomical-telescope-c-the-ix69li 2026-08-12T03:57:22.627Z weekly 0.6 https://conceptfirst.ai/senior-secondary/west-bengal-wbchse/class-12-science/physics/wb-phys-ray-optics-and-optical-instruments/q/wbc-physics-2016-annual-q25-in-an-astronomical-telescope-focal-length-of-the-objective-is-made-eck57i 2026-08-12T03:57:22.627Z weekly 0.6 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