Question

Above the threshold frequency, the maximum kinetic energy of the emitted photoelectron

• A. depends on the frequency of the incident radiation
• B. depends on the intensity of incident radiation
• C. is independent of the intensity of incident radiation
• D. both (a) and (c)

Answer 1

The correct option is D both (a) and (c)

Above the threshold , max K.E is given = $e{v}_0$ where $e$ is the charge of electron and $v_0$ is stopping potential .

But, $e{v}_0\propto \nu$

So, $K.E\propto \nu$

Also, K.E is independent of intensity of incident radiation .On increasing the intensity , only photocurrent increases but K.E remains same.

So, K.E depends upon freq. and not on intensity.