Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-diagram based-Easy-Class 12
Consider a diagram showing a metal surface with incident light causing the emission of electrons. Which physical process is responsible for this emission if the electrons gain energy through heating?
A
Thermionic emission
B
Photoelectric emission
C
Field emission
D
Secondary emission
Correct Answer
Option A
Detailed Explanation
Thermionic emission occurs when sufficient thermal energy is imparted to free electrons to enable them to come out of the metal, as described in the NCERT context.
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