Electronic Devices Question 181
Question: Thermionic emission from a heated filament varies with its temperature T as
[CBSE PMT 1990; RPMT 2000; CPMT 2002]
Options:
A)
B)
C)
D)
Show Answer
Answer:
Correct Answer: C
Solution:
According to Richardson-Dushman equation, number of thermions emitted per sec per unit area
Therefore
