KCET2026PhysicsDual Nature of Matter
Variation of photoelectric current with anode potential is shown below. Choose the correct option ( V₀ = stopping potential)
Correct answer
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Step-by-step solution
In the photoelectric effect, the variation of photoelectric current with anode potential has the following characteristics: 1. At zero anode potential, there is still some photoelectric current because the emitted photoelectrons possess initial kinetic energy and can reach the anode. 2. When a negative (retarding) potential is applied to the anode, the photoelectric current decreases. It becomes zero at a specific negative potential known as the stopping potential ( -V₀ ). 3. As the positive anode potential is incr