Physics Electron, Photon, Photoelectric Effect and X-rays Einstein Photoelectric Equation: Energy Quantum of Radiation MCQ (Single Correct)

In a photoelectric experiment, the potential difference that must be maintained between the illuminated surface and the collector so as just to prevent any electron from reaching the collector is determined for different frequencies f of the incident illumination. The graph obtained is shown. The maximum kinetic energy of the electrons emitted at frequency is

A
B

C
D

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The correct answer is:
C

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