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The process through which free electrons leave the surface of hot metal is known as?

Physics
JAMB 2006

The process through which free electrons leave the surface of hot metal is known as?

  • A. photon emission
  • B. photo emission
  • C. thermionic emission
  • D. electron emission
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Correct Answer: Option C
Explanation

This process occurs when the thermal energy of the metal is sufficient to allow electrons to overcome the work function and escape from the surface.

There is an explanation video available below.

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Explanation Video

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