Question

The variation of photocurrent with collector potential for different frequencies of incident radiation ${\nu }_1,{\nu }_2,{\nu }_3$ is as shown in the graph, then

• A. ${\nu }_1={\nu }_2={\nu }_3$
• B. ${\nu }_1>{\nu }_2>{\nu }_3$
• C. ${\nu }_1<{\nu }_2<{\nu }_3$
• D. ${\nu }_3=\frac{{\nu }_1+{\nu }_2}{2}$

Answer 1

Answer: (C)

The smaller the incident frequency, the smaller the stopping voltage required.

${\nu }_3>{\nu }_2>{\nu }_1$