How transistor can be used as an oscillator.

How transistor can be used an amplifier?

Explain, how a transistor can be used as a switch with the help of a circuit diagram.

Why transistor can't be used as a rectifier?

How junction Diode can be used as a full wave rectifier.

The input resistance of a silicon transistor is 100 Ω. Base current is changed by 40μA which results in a change in collector current by 2 mA. This transistor is used as a common emitter amplifier with a load resistance of 4K Ω. Find the voltage gain of the amplifier.

In a transistor, the base current is changed by 20muA . This results in a change of 0.02V in base emitter voltage and a change of 2mA in the collector current. .If the transistor is used as an amplifier with load resistance of 5KΩ .Find its voltage gain.

What is the use of transistor.