Semiconducting Devices Question 269

Question: The amplification factor of a triode is 20 and trans-conductance is 3 milli mho and load resistance 3×104Ω , then the voltage gain is

[RPMT 1996]

Options:

A) 16.36

B) 28

C) 78

D) 108

Show Answer

Answer:

Correct Answer: A

Solution:

Using voltage gain Av=μ1+rpRL also μ=rp×gm
rp=μgm=203×103
Av=201+203×103×3×104 = 18011 =16.36.



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