A photoelectric cell is illuminated by a point source of light `1m` away. When the source us shifted to `2m` then-

Options

A. each emitted electron carries one quarter of the initial energy
B. number of electrons emitted is hlaf the initial number
C. each emitted electron carries half the initial energy
D. number of electrons emitted is a quarter of the initial number

Answer

D

Explanation

`:' I prop (1)/(r^(2)) :.` intensity becomes `1/4` th