Electronic Devices Question 221
Question: The current in a triode at anode potential 100 V and grid potential - 1.2 V is 7.5 mA. If grid potential is changed to - 2.2 V, the current becomes 5.5 mA. the value of trans conductance (gm) will be
[RPMT 2003]
Options:
A) 2 mili mho
B) 3 mili mho
C) 4 mili mho
D) 0.2 mili mho
Show Answer
Answer:
Correct Answer: A
Solution:
$ g _{m}={{( \frac{\Delta I _{p}}{\Delta V _{g}} )} _{V _{p}=\text{constant}}}=\frac{(7.5-5.5)}{-1.2-(-2.2)}=2mmho $
