Modern Physics 7 Question 38

40. The plate resistance of a triode is $3 \times 10^{3} \Omega$ and its mutual conductance is $1.5 \times 10^{-3} A / V$. The amplification factor of the triode is

(1981, 2M)

(a) $5 \times 10^{-5}$

(b) 4.5

(c) 45

(d) $2 \times 10^{5}$

Numerical Value

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Solution:

  1. Given, $r _p=3 \times 10^{3} \Omega, g _m=1.5 \times 10^{-3} A / V$

$\therefore$ Amplification factor, $\mu=g _m \times r _p=4.5$



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