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

Why cannot we use $\mathrm{Si}$ and $\mathrm{Ge}$ in fabrication of visible LEDs ?

Three photo diodes $D1, D2$ and $D3$ are made of semiconductors having band gaps of $2.5\mathrm{eV}, 2\mathrm{eV}$ and $3\mathrm{eV}$, respectively. Which ones will be able to detect light of wavelength $600 nm$ ?

Given Planck constant is $h=6.62\times {10}^{-34} m^2 kg s^{-1}$,speed of light $c=3\times {10}^{8 }m{s}^{-1}$

The probability of finding electrons in the conduction band of an intrinsic semiconductor at a finite temperature

A solar cell is p - n junction operating in _____ condition.
 

The RMS value of the half-wave rectifier is _____.

The highest energy level which can be occupied by an electron in the valence band at $0\text{K}$ is called _____ level.

 Threshold voltage is approximately $0.2 V$ in _____.

The vacuum tubes are also known as _____.