Semiconductors

A reverse biased zener diode when operated in the breakdown region works as

The effect of increase in temperature on the number of electrons in conduction band $\left(\mathrm{n}_{\mathrm{e}}\right)$ and resistance of a semiconductor will be as:

A transistor is connected in common-emitter (CE) configuration. The collector supply is $8 \mathrm{~V}$ and the voltage drop across a resistor is $500 \Omega$ in the collector circuit is $0.6 \mathrm{~V}$. If the…

For an insulator, the forbidden energy gap is

A zener diode of voltage $\mathrm{V}_{\mathrm{Z}}(=6 \mathrm{~V})$ is used to maintain a constant voltage across a load resistance $\mathrm{R}_{\mathrm{L}}(=1000 \Omega)$ by using a series resistance…

If the forward voltage in a semiconductor diode is changed from $0.5 \mathrm{~V}$ to $0.7 \mathrm{~V}$, then the forward current changes by $1.0 \mathrm{~mA}$. The forward resistance of diode junction will be

At a certain temperature, the number density of charge carriers in a semiconductor is $n$. When an electric field is applied to it, the charge carriers drift with an average speed $v$. If the temperature of the…

A common emitter amplifier has a voltage gain of $50$, an input impedance of $100 Ω$ and an output impedance of $200 Ω$. The power gain of the amplifier is

For a CE transistor amplifier, the audio signal voltage across the collector resistance of $2.0 \mathrm{k} \Omega$ is $2.0 \mathrm{~V}$. Suppose the current amplification factor of the transistor is 100 , What should be…

An oscillator is nothing but an amplifer with

In a semiconductor diode, the barrier potential offers opposition to

The output of an OR gate is connected to both the inputs of a NAND gate. The combination will serve as a: