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(A) : In photoelectric effect, when the frequency of incident light is doubled, kinetic energy is more than doubled.
(R) : Photo current increases when the intensity of incident light is increased and is independent of frequency.

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Both ‘A’ and ‘R’ are true and ‘R’ is the correct explanation of ‘A’.

‘A’ is true but ‘R’ is false

Both 'A' and 'R' are false

Both ‘A’ and ‘R’ are true and ‘R’ is not the correct explanation of ‘A’

answer is B.

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Detailed Solution

(A) : In photoelectric effect, when the frequency of incident light is doubled, kinetic energy is more than doubled.

KE = hv - W

W( work function ) is constant for given metal when frequency of incident radiation is doubled kinetic energy is more than doubled

(R) : Photo current increases when the intensity of incident light is increased and is independent of frequency.

Intensity of radiation $\propto$ Photo current.

Photo current is independent of frequency of radiation,

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