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Q.

The minimum energy required for the electron emission from the metal surface can be supplied to the free electrons by which of the following physical processes?

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a

Field emission

b

All of these

c

Thermionic emission

d

Photoelectric emission

answer is D.

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Detailed Solution

For electron emission energy is required. This energy can be supplied by Thermionic emission, field emission, photoelectric emission.

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The minimum energy required for the electron emission from the metal surface can be supplied to the free electrons by which of the following physical processes?