In photoelectric effect
A. The photocurrent is proportional to the intensity of the incident radiation.
B. Maximum kinetic energy with which photoelectrons are emitted depends on the intensity of incident light.
C. Max K.E. with which photoelectrons are emitted depends on the frequency of incident light.
D. The emission of photoelectrons require a minimum threshold intensity of incident radiation.
E. Max K.E. of the photoelectrons is independent of the frequency of the incident light.
Choose the correct option from the options given below:

Let us analyze each statement about the photoelectric effect:

A. The photocurrent is proportional to the intensity of the incident radiation.

This is correct. Higher intensity means more photons per second, which means more photoelectrons are emitted, leading to higher photocurrent.

B. Maximum kinetic energy with which photoelectrons are emitted depends on the intensity of incident light.

This is incorrect. The maximum KE depends on the frequency, not the intensity.

C. Max K.E. with which photoelectrons are emitted depends on the frequency of incident light.

This is correct. From Einstein's equation: $$KE_{max} = h\nu - \phi$$, where $$\nu$$ is the frequency.

D. The emission of photoelectrons require a minimum threshold intensity of incident radiation.

This is incorrect. Photoelectron emission requires a minimum threshold frequency, not intensity.

E. Max K.E. of the photoelectrons is independent of the frequency of the incident light.

This is incorrect. As seen from Einstein's equation, max KE depends on frequency.

The correct statements are A and C only.

The correct answer is Option 3.