Statement-I: When ultraviolet light is incident on a photoc…

Physics Atomic and Nuclear Physics JEE (Main) / AIEEE Problems (Previous Years - Atomic) MCQ (Single Correct)

Statement-I: When ultraviolet light is incident on a photocell, its stopping potential is and the maximum kinetic energy of the photoelectrons is . When the ultraviolet light is replaced by X-rays, both and increase.

Statement-II: Photoelectrons are emitted with speeds ranging from zero to a maximum value because of the range of frequencies present in the incident light.

Statement-I is true, Statement-II is true; Statement-II is the correct explanation of Statement-I.

Statement-1 is true, Statement-II is true; Statement-II is not the correct explanation of Statement-I

Statement-I is false, Statement-II is true.

Statement-I is true, Statement-II is false.

Text Solution

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The correct answer is:

Energy of X-rays-photon is greater then ultraviolet photon.

So, and increases.
Electrons have speed ranging from 0 to maximum, because before emitting a large number of collisions take place and energy is lost in collision.

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