Question

If the value of Re is zero then voltage gain is 200 find voltage gain when Re is 2k ohm​

Answer 1

Given that,

Output resistance $R_{e}= 0$

Voltage gain $\beta=200$

Suppose, the current gain is 50 and input resistance is 400Ω.

If the output resistance is 2kΩ.

We need to calculate the voltage gain

Using formula of voltage gain

$A_{v}=\beta\times\dfrac{R_{e}}{R_{i}}$

Where,

$R_{e}$ = output resistance

$R_{i}$ = input resistance

$\beta$ = current gain

Put the value into the formula

$A_{v}=50\times\dfrac{2\times1000}{400}$

$A_{v}=250$

Hence, The voltage gain is 250.