Which of the following options represent the variation of photoelectric current with property of light shown on the x-axis?A. Photoelectric current vs Intensity of light: straight line through origin risingB. Photoelectric current vs Intensity of lig…

Answer: 1. A only

Key idea: at a fixed frequency above the threshold, the photoelectric current is directly proportional to the intensity. At a fixed intensity, the current does not depend on the frequency (as long as it is above the threshold).

• A (current vs intensity, straight line through the origin): correct.
• B (constant with intensity): wrong.
• C (current rising linearly with frequency): wrong, since the current does not increase with frequency.
• D (zero below threshold, then rising linearly): wrong, as the current is constant (not rising) above the threshold. It is the stopping potential or the kinetic energy that varies linearly with frequency.

So only A is correct.