Question

The slope of a graph drawn between threshold frequency and stopping potential is :

• A. $e$
• B. $h$
• C. $\frac{h}{e}$
• D. $he$

Answer 1

Answer: (C)

Relation between threshold frequency - $\left(v_0\right)$ and potential $V_0$ is
$e{V}_0=h{v}_0-\varphi$
So, $V_0=\frac{h}{e}\left(v_0\right)-\frac{\varphi }{e}$
Hence, slope of the graph is $\frac{h}{e}$