Question

When monochromatic light of intensity $v=3v_0$ ($v_0$ is the threshold frequency) is incident on the cathode in a photoelectric experiment setup the saturation current is found to be $2\mu A$ and the stopping potential is $V_0$. The photoelectric efficiency of the photo metal used to coat the cathode is independent of the frequency of incident radiation. If the Intensity of the incident radiation is doubled and its frequency halved then choose the correct statement(s).

• A. The stopping potential is $\frac{V_0}{2}$
• B. The stopping potential is $<\frac{V_0}{2}$
• C. The saturation photo current is $4\mu A$
• D. The saturation photo current is $8\mu A$

Answer 1

Answer: (B), (C)

The correct options are
B The stopping potential is $<\frac{V_0}{2}$
C The saturation photo current is $4\mu A$