Embibe Experts Solutions for Chapter: Semiconductor Electronics: Materials, Devices and Simple Circuits, Exercise 1: Exercise

Describe how a semiconductor diode is used as a half-wave rectifier.

Draw the circuit diagram of a full wave rectifier. Briefly explain its working.

Describe with a circuit diagram how ac voltage is rectified with the help of a diode.

Why silicon diode is better compared to a germanium diode in a rectifier ?

Draw the circuit diagrams for half-wave and full-wave rectification done with a $p$$n$- diodes. Explain the action of diodes. Draw the input and output waveforms.

When a semiconducting material is doped with an impurity, new acceptor levels are created. In a particular thermal collision, a valence electron receives an energy equal to $2kT$ and just reaches one of the acceptor levels. Assuming that the energy of the electron was at the top edge of the valence band and that the temperature $T$ is equal to $300 \mathrm{K}$, find the energy of the acceptor levels above the valence band.

The band gap between the valence and the conduction bands in zinc oxide $\left(\mathrm{ZnO}\right)$ is $3.2 \mathrm{eV}$. Suppose an electron in the conduction band combines with a hole in the valence band and the excess energy is released in the form of electromagnetic radiation. Find the maximum wavelength that can be emitted in this process.

Draw the  circuit diagram of a full wave rectifier.