Question: What is the effect of increasing the intensity of light on the photoelectric effect?

Options:

1. It increases the energy of emitted electrons
2. It increases the number of emitted electrons
3. It decreases the threshold frequency
4. It has no effect on the photoelectric effect

Correct Answer: It increases the number of emitted electrons

Solution:

Increasing the intensity of light increases the number of photons hitting the surface, which in turn increases the number of emitted electrons, provided the frequency is above the threshold.