Q. 22

# The gain factor o

Answer :

…(i)

where A is the voltage gain, μ is the amplification factor, R_{L} is the load resistance and r_{p} is the plate resistance

Given:

A_{1}=10, R_{l1} = 4kΩ

A_{2}=12, R_{l2} = 8kΩ

Putting these two values in equation (i)

We get a linear equation in 2 variables (r_{p} and μ)

…(ii)

We will get another equation by substituting the values of A_{2} and R_{l2} is equation (i)

… (iii)

Solving (ii) and (iii) to find the values amplification factor and the plate resistance.

&

From (ii)

…(iv)

Substituting (iv) in (iii)

Using μ =15, the value of r_{p} is 2000Ω or 2 kΩ

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