Question

The graph shows the variation of photocurrent with the applied voltage in a photoelectric effect experiment for three different beams of light falling on identical metal surfaces, then which among the following is correct?

• A. $A$ and $B$ recieve the light of the same intensity while $B$ & $C$ receive the light of the same frequency
• B. $B$ and $C$ recieve the light of the same intensity while $A$ & $B$ recieve the light of the same frequency
• C. $A$ & $B$ recieve the light of the same frequency while $B$ & $C$ recieve the light of the same intensity
• D. $A$ and $C$ recieve the light of the same intensity and $B$ & $C$ recieve the light of the same frequency

Answer 1

Answer: (A)

Saturation current for $A$ and $B$ Incident light will have the same intensity while stopping potential is same for $B$ and $C$
$eV_{s}=K_{m a x}=h\nu-\phi$
Frequency of incident light will be the same