Semiconducting Devices Question 264
Question: The grid voltage of any triode valve is changed from -1 volt to - 3 volt and the mutual conductance is $ 3\times {{10}^{-4}} $ mho. The change in plate circuit current will be
[MNR 1999]
Options:
A) 0.8 mA
B) 0.6 mA
C) 0.4 mA
D) 1 mA
Show Answer
Answer:
Correct Answer: B
Solution:
By using $ g _{m}=\frac{\Delta i _{p}}{\Delta v _{g}} $
Therefore $ 3\times {{10}^{-4}}=\frac{\Delta i _{p}}{-1-(-3)} $
Therefore $ \Delta i _{p}=6\times {{10}^{-4}}A=0.6mA $
