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Question 52 of 55

Q.In the circuit given below, the equivalent resistance between the two points A and B will be

(a) 4 Ω
(b) 1 Ω
(c) 3 Ω
(d) 2 Ω
A resistor network between A and B with two 2 ohm resistors in series on the top rail and four vertical branches of 5, 2, 3 and 3 ohm — West Bengal Class 12 Physics equivalent-resistance question
Figure
West Bengal WbchseWest Bengal HS (WBCHSE) Board 2026MCQ· 1mImportance★★★★★
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Reducing the resistor network by series–parallel combination (the two 2 Ω top resistors together with the vertical 5 Ω, 2 Ω, 3 Ω and 3 Ω arms) yields an equivalent resistance of 2 Ω between A and B. Option (d).

This is a standard equivalent-resistance problem from the NCERT/CBSE Class 12 Physics chapter on Current Electricity, solved by stepwise series–parallel reduction (and, where a bridge is balanced, dropping the zero-current middle arm).

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