Semiconducting Devices Question 280
Question: In the circuit of a triode valve, there is no change in the plate current, when the plate potential is increased from 200 volt to 220 volt and the grid potential is decreased from - 0.5 volt to -1.3 volt. The amplification factor of this valve is
[MP PMT 1989]
Options:
A) 15
B) 20
C) 25
D) 35
Show Answer
Answer:
Correct Answer: C
Solution:
$ \mu =\frac{({V _{p _{1}}}-{V _{p _{2}}}}{({V _{G _{1}}}-{V _{G _{2}}})} $
$ =\frac{(200-220)}{(0.5-1.3)}=25.$
