A cesium photocell, with a steady potential difference of 60 V across, is illuminated by a bright point source of light 50 cm away. When the same light is placed 1 m away, the photoelectrons emitted from the cell -

Are one quarter as numerous Are half as numerous Each carry one quarter of their previous momentum Each carry one quarter of their previous energy

Are one quarter as numerous

d1 = 50 cm d2 = 1m = 100 cm $d_1=2d_1(I∝\frac{1}{d^2})$ I2 = I1/4 $n_{ph_2}=\frac{n_{ph_1}}{4}$ $n_{e_2}=\frac{n_{e_1}}{4}$