Question

Assertion (A) : Photoelectric current increases with an increase in intensity of incident radiation, for a given frequency of incident radiation and the accelerating potential. Reason (R) : Increase in the intensity of incident radiation results in an increase in the number of photoelectrons emitted per second and hence an increase in the photocurrent.

Assertion (A) : Photoelectric effect demonstrates the particle nature of light. Reason (R) : Photoelectric current is proportional to frequency of incident radiation.

The quantum nature of light explains the observations on photoelectric effect as –

Assertion (A) : Electrons are ejected from the surface of zinc when it is irradiated by yellow light. Reason (R) : Energy associated with a photon of yellow light is more than the work function of zinc.