Question

(A) The kinetic energy of the photoelectron ejected increases with increase in the intensity of incident radiation.
(R) Increase in intensity of incident light increases the rate of emission.

• A. Both (R) and (A) are true and reason is the. correct explanation of assertion
• B. Both (R) and (A) are true but reason is not correct explanation of assertion
• C. Assertion (A) is true but reason (R) is false
• D. Assertion (A) and reason (R) both are false
• E. Assertion (A) is false but reason (R) is true

Answer 1

The correct option is E Assertion (A) is false but reason (R) is true

Relation between kinetic energy and frequency is $K.E=\varphi -h\nu$.

here $h$ = Planck's constant h = $6.62\times {10}^{-34}$ , $\varphi =$ work function of Metal

Kinetic energy of Photoelectrons depend on frequency of incident light.

If we increase intensity of incident light numbers of incident photons will increase so as numbers of Photoelectrons.