Question

explain the effect of photo electric current with collector plate potential​

Answer 1

Answer:

Photoelectric current increases with increase in accelerating (positive) potential. ... When the potential of the collector plate is made more and more negative (retarding) with respect to the plate emitter, the electrons are repelled and only the most energetic electrons reach the collector.

Answer 2

$\bigstar$ Photoelectric current increases with increase in accelerating potential.

$\bigstar$ At some stage, for a certain positive potential of collector plate , the photoelectric current becomes maximum or saturates.

$\bigstar$ If potential of collector plate is further increased, the photocurrent remains same.

$\bigstar$ When the potential of the collector plate is made more and more negative with respect to the emitter plate, the electrons are repelled and only the most energetic electrons reach the collector.

$\bigstar$ The photocurrent decreases rapidly until it drops to zero at certain sharply defined, critical value of the negative potential $\sf v_{0}$ .

$\bigstar$ For a particular frequency of incident radiation, the minimum negative potential $\sf v_{0}$ given to the collector plate for which the photoelectrons are completely stopped from reaching collector or photocurrent becomes zero is called the cut-off.