Question

In photoelectric effect on increasing the collector plate potential (accelerating potential) the photoelectric current

• A. Keeps increasing
• B. Increases first and then becomes constant
• C. Remains constant irrespective of potential value
• D. Decreases continuously

Answer 1

The correct option is B Increases first and then becomes constant

We know that as potential of collector plate increases, current produced through photoelectric effect also increases but after reaching a certain point this current stops increasing even if we increase positive potential. This potential is known as saturated potential.

Hence, option $\left(\text{B}\right)$ is the right answer.