Assertion (A): When ultraviolet light is incident on two photosensitive metals having different work functions then maximum kinetic energy of the photo electrons is greater for metal having low work function.
Reason (R): Kinetic energy $= \dfrac{1}{2}mv^2$

(a) Both A and R are c

Question

Assertion (A): When ultraviolet light is incident on two photosensitive metals having different work functions then maximum kinetic energy of the photo electrons is greater for metal having low work function.
Reason (R): Kinetic energy $= \dfrac{1}{2}mv^2$

(a) Both A and R are correct and R is the correct explanation of A.
(b) Both A and R are correct but R is not correct explanation of A.
(c) A is correct but R is incorrect.
(d) A and R both are incorrect.

Accepted Answer

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> [!TLDR]
> A is true by Einstein's photoelectric equation; R is a true but generic definition of KE that, by itself, does not explain why a lower work function gives a higher maximum photoelectron KE.
>
> Assertion (A) is true. By Einstein's photoelectric equation, the maximum kinetic energy of an emitted photoelectron is …

Q.Assertion (A): When ultraviolet light is incident on two photosensitive metals having different work functions then maximum kinetic energy of the photo electrons is greater for metal having low work function.
Reason (R): Kinetic energy $= \dfrac{1}{2}mv^2$

Q.Assertion (A): When ultraviolet light is incident on two photosensitive metals having different work functions then maximum kinetic energy of the photo electrons is greater for metal having low work function.
Reason (R): Kinetic energy $= \dfrac{1}{2}mv^2$

Q.Assertion (A): When ultraviolet light is incident on two photosensitive metals having different work functions then maximum kinetic energy of the photo electrons is greater for metal having low work function. Reason (R): Kinetic energy =12mv2= \dfrac{1}{2}mv^2=21​mv2

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Q.Assertion (A): When ultraviolet light is incident on two photosensitive metals having different work functions then maximum kinetic energy of the photo electrons is greater for metal having low work function. Reason (R): Kinetic energy =12mv2= \dfrac{1}{2}mv^2=21​mv2

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Q.Assertion (A): When ultraviolet light is incident on two photosensitive metals having different work functions then maximum kinetic energy of the photo electrons is greater for metal having low work function.
Reason (R): Kinetic energy $= \dfrac{1}{2}mv^2$

Unlock the full solution

Q.Assertion (A): When ultraviolet light is incident on two photosensitive metals having different work functions then maximum kinetic energy of the photo electrons is greater for metal having low work function.
Reason (R): Kinetic energy $= \dfrac{1}{2}mv^2$

Unlock the full solution