JEE Main 2012 Physics question

Photoelectrons are ejected from a metal when light of frequency v falls on it. Pick out the wrong statement from the following.

(1)No electrons are emitted if v is less than W/h, where W is the work function of the metal
(2)The ejection of the photoelectrons is instantaneous.
(3)The maximum energy of the photoelectrons is hu.Correct
(4)The maximum energy of the photoelectrons is independent of the intensity of the light.

Answer: (3)

Solution

The maximum kinetic energy is , not hν, so (3) is wrong. The other statements are correct features of the photoelectric effect.

Question ID VK-103651