Embibe Experts Solutions for Chapter: Electronic Devices Semiconductors, Exercise 1: Level 1

$\mathrm{LED}$ is a  $\mathrm{p}-\mathrm{n}$  junction diode which is 

Symbol of Zener diode is

Which type of gate the following truth table represents? 

The truth table for the following circuit is

The figure shows a logic circuit with two inputs $A$ and $B$ and the output $C$. The voltage waveforms across $A$, $B$ and $C$ are as given. The logic circuit gate is

Three variable Boolean expression $PQ+PQR+\overline{P}Q+P\overline{Q}R$ can be written as

Height of T.V. tower is $h_{\mathrm{T}}.$ The area of transmission of T.V. waves is $\propto$ _________.

The maximum and minimum amplitudes of an AM wave are $10 \mathrm{V}$ and $3 \mathrm{V}$ respectively. The modulation index is $\frac{x}{13}$. Find the value of $x$.