Question

In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is $3k\Omega$. If current gain is 100 and the base resistance is $2k\Omega$, the voltage and power gain of the amplifier is

• A. 15 and 200
• B. 150 and 15000
• C. 20 and 2000
• D. 200 and 1000

Answer 1

The correct option is B

150 and 15000

Current gain, $\beta =100$
Voltage gain, $A_v=\beta \frac{R_c}{R_b}=100\times \frac{3}{2}=150$
Power gain = $A_v\beta =150\times 100=15000$