Physics Electron, Photon, Photoelectric Effect and X-rays Photon and Photoelectric Effect MCQ (Single Correct)

Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV. The minimum kinetic energy of the emitted photo-electrons will be

A
0 eV
B
1 eV
C
2 eV
D
10 eV

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Verified by Experts
The correct answer is:
A

We can determine the maximum kinetic energy of a photoelectron using Einstein's equation of the photoelectric effect. But, all photoelectrons are not ejected with maximum kinetic energy.

Kinetic energy of the emitted photoelectrons varies from zero to a maximum value.

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