Transistor as an Amplifier
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In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. 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
15 and 200
150 and 15000
20 and 2000
200 and 1000
If current gain of a transistor is . What is the value of-current gain of the transistor?
For CE transistor amplifier, the audio signal voltage across the collector resistance of 2 kΩ is 4V. If the current amplification factor of the transistor is 100 and the base resistance is 1 kΩ, then the input signal voltage is
10 mV
20 mV
30 mV
15 mV
- 300cos(15 t+4π3)
- 300cos(15 t+π3)
- 75cos(15 t+2π3)
- 2cos(15 t+5π6)
- 2.02 mA
- 2.00 mA
- 1.01 mA
- 120 mA
- 625 W
- 25 W
- 6250 W
- 125 W
- Ie<Ib
- Ib<Ie
- Ic<Ie
- Ie<Ic
- 40 μA
- 25 μA
- 20 μA
- 40 μA
- 1.02
- 0.98
- 98
- 1
- 500
- 460
- 600
- 560
- 0.95
- 1.5
- 19
- (19)−1
Which of the following is true?
- Common base transistor is commonly used because current gain is maximum
- Common emitter is commonly used because current gain is maximum
- Common collector is commonly used because current gain is maximum
- Common emitter is the least used transistor
In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. 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
15 and 200
150 and 15000
20 and 2000
200 and 1000