Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-fact-Easy-Class 12
What phenomenon can enable free electrons to come out of a metal surface through heating?
A
Thermionic emission
B
Photoelectric effect
C
Electron diffraction
D
Thermal conduction
Correct Answer
Option A
Detailed Explanation
Thermionic emission is the process where free electrons gain sufficient thermal energy from heating to escape from the metal surface, as outlined in the provided context.
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