Embibe Experts Solutions for Chapter: Semiconductor Electronics: Materials, Devices and Simple Circuits, Exercise 1: Punjab Board-2018

Choose  the correct option :
Electrical conductivity of a semiconductor-
 

Why does the thickness of the depletion layer of $\mathrm{p}-\mathrm{n}$ junction increase in reverse biassing? Draw the circuit diagram of reverse biassing. 

Write truth table of $\mathrm{AND}$ gate.

What is a rectifier? Explain the working of p-n junction diode as a full-wave rectifier with the help of a suitable circuit diagram.

In a sample of semiconductor mobilities of electrons and holes are $24\times {10}^3{\mathrm{cm}}^2{\mathrm{V}}^{-1}{\mathrm{s}}^{-1}$and $0.2\times {10}^3{\mathrm{cm}}^2{\mathrm{V}}^{-1}{\mathrm{s}}^{-1}$  respectively. If the density of electrons is $0.8\times {10}^{14}{\mathrm{cm}}^{-3}$ and that of holes is $0.4\times {10}^{14}{\mathrm{cm}}^{-3}$. Find the nature of the semi-conductor and its conductivity.

A p- type semiconductor is obtained by doping silicon with Indium

Give two points of difference between $\text{n-type}$ and $\mathrm{p}- \mathrm{type}$ semiconductor.

Explain with the help of a circuit diagram, how  $\mathrm{V}-\mathrm{I}$ characteristics of P-n junction are obtained in forward biasing.