JEE · NEET Previous Year Question

$In a photoelectric experiment, increasing the intensity of incident light:$

Topic: JEE PYQ

Answer: D. Full step-by-step solution below.

A $increases the number of photons incident and also increases the K.E. of the ejected electrons$
B $increases the frequency of photons incident and increases the K.E. of the ejected electrons.$
C $increases the frequency of photons incident and the K.E. of the ejected electrons remains unchanged$
D $increases the number of photons incident and the K.E. of the ejected electrons remains unchanged$

Correct answer: D

Solution

(d) \to Increasing intensity means number of incident photons are increased. \to Kinetic energy of ejected electrons depend on the frequency of incident photons, not the intensity.