An oscillator is nothing but an amplifier with

When $NPN$ transistor is used as an amplifier,

The transfer characteristic curve of a transistor,having input and output resistance $100\,\Omega$ and $100\,k\Omega$ respectively,is shown in the figure. The voltage and power gain are respectively:

In the following circuit, a voltmeter $V$ is connected across a lamp $L$. What change would occur in the voltmeter reading if the resistance $R$ is reduced in value?

When an $NPN$ transistor is used as an amplifier,which of the following occurs?

The graph between the input voltage $(V_{i})$ and the output voltage $(V_{o})$ of a transistor connected in common emitter configuration is shown in the figure. The active, saturation and cutoff regions of the transistor are respectively