NEET Physics MCQs

A transistor is operating in common emitter configuration. If the collector current is 10 mA and the base current is 20 μA, what is the current gain (β) of the transistor?

A npn transistor is connected in common emitter configuration in a given amplifier. A load resistance of $800 \Omega$ is connected in the collector circuit and the voltage drop across it is 0.8 V. If the current amplification factor is 0.96 and the input resistance of the circuit is $192 \Omega$, the voltage gain and the power gain of the amplifier will respectively be:

In a common emitter amplifier, a npn transistor has a load resistance of $1 k\Omega$ with a voltage drop of 1 V across it. If the current amplification factor is 0.98 and the input resistance is $200 \Omega$, determine the voltage gain and power gain.

A transistor in common emitter configuration amplifies a signal. With a collector load resistance of $500 \Omega$ and a voltage drop of 0.5 V, the output current is measured. Given a current amplification factor of 0.95 and an input resistance of $100 \Omega$, what is the input voltage?

If the voltage gain of a common emitter amplifier is 5 and the current gain is 0.97, what is the power gain?

A common emitter amplifier with a npn transistor has an input voltage of 0.1 V and an output voltage of 0.4 V. What is the voltage gain of the amplifier?

In $CE$ mode, the input characteristics of a transistor is the variation of

The current gain of a transistor in common base mode is 0.995. the current gain of the same transistor in common emitter mode is

In $CE$ mode, the input characteristics of a transistor is the variation of

In a common emitter transistor amplifier ${\rm{\beta }} = 60,\;{R_0} = 5000{\rm{\Omega }}$ and internal resistance of a transistor is $500{\rm{\Omega }}$. The voltage amplification of amplifier will be