Question

33. When a point source of light is at a distance of one metre from a photocell, the cut of
voltage is found to be V. If the same source is placed at 2m distance from photocell
the cut off voltage will be
BV/2
C) V/4
DIVINE
Light of frequency 4 12 is incident on the metal of the threshold frequency vs. The
AV
stal of the threshola streguen​

Answer 1

D is the correct answer