Question

The input resistance of transistor is 1000 $\Omega$on charging its base current by 10$\mu A,$ the collector current increases by 2 mA if a load resistance is 5 $k\Omega$ is used in the circuit, the voltage gain of the amplifier is

• A. 100
• B. 500
• C. 1000
• D. 1500

Answer 1

Answer: (C)

1000

Answer 2

: current gain, $\beta = \left( \frac{\Delta I_{C}}{\Delta I_{B}} \right)_{V_{CE}}$

And voltage gain, $A_{V} = \beta\frac{R_{out}}{R_{in}}$

Here, $A_{V} = \frac{200 \times 5 \times 10^{3}}{1000} = 1000$