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

Question

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

Tardigrade Admin · Accepted Answer

Current gain (β)=100 Voltage gain ( A V ) =β (Rc/Rb) =100((3/2)) =150 Power gain = Av β = 150(100) = 15000

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

15 and 200

150 and 15000

20 and 2000

200 and 1000

Current gain $(β) = 100$
Voltage gain $(A_{V}) = β \frac{R _{c}}{R _{b}}$
$= 100 (\frac{3}{2})$
$= 150$
Power gain $= A_{v} β$
$= 150 (100)$
$= 15000$

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