Concepts Of Physics MCQ Edition [Volume 2]PhysicsPhotoelectric Effect and Wave–Particle Duality

In a photoelectric effect experiment, the photocurrent increases if

Options

Athe intensity of the source is increased
Bthe exposure time is decreased
Cthe exposure time is increased
Dthe intensity of the source is decreased

Correct answer

A. the intensity of the source is increased

Step-by-step solution

In a photoelectric effect experiment, the photocurrent is directly proportional to the intensity of the incident light, assuming the frequency of the incident light is greater than the threshold frequency. The intensity of light represents the number of photons incident per unit area per unit time. When the intensity of the source is increased, more photons strike the metal surface per second. This results in the emission of a greater number of photoelectrons per second, thereby increasing the photocurrent. Photocu

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