Electric Circuits and Networks

6.10 QUESTIONS

1. A voltage amplifier made using transistors uses a 15 V power supply. Explain why its peak-to-peak output when driven by a sinusoidal source has to be less than 15 V.
2. Explain why the Thevenin's equivalent of the output side of a voltage amplifier will have a non-zero Thevenin's equivalent resistance.
3. A transistor voltage amplifier uses 10 V power supply. It has a gain of 100 and is loaded by a 1 kΩ resistor. Input applied to the amplifier is 0.05 V DC. Explain why the current drawn from the power supply has to be more than 2.5 mA.
4. A transistor voltage amplifier uses 24 V power supply. It has a gain of 50 and is loaded by a 120 Ω resistor. Input applied to the amplifier is 0.24 V DC. The current drawn from the power supply is seen ...