Embibe Experts Solutions for Chapter: Electronic Devices, Exercise 3: Level 3

If a full wave rectifier circuit is operated from $100 \mathrm{Hz}$ mains, the fundamental frequency in the ripple will be

Which of following gates produces output of $1?$

The current gain for a transistor used in the common-emitter configuration is $98.$ If the load resistance be $1 \mathrm{M\Omega }$ and the internal resistance be $600 \mathrm{\Omega },$ what is the voltage gain?

Carbon, silicon and germanium have four valence electrons each. At room temperature, which one of following statements is most appropriate?

If the ratio of the concentration of electrons to that of holes in a semiconductor is $\frac{7}{5}$ and the ratio of currents is $\frac{7}{4}$, then what is the ratio of their drift velocity?

The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the,

The truth table for the following logic circuit is,

The density of electrons and holes in a pure germanium sample at room temperature are equal and its value is $3\times {10}^{16}$ per ${\mathrm{m}}^3$. On doping with aluminium, it increases to $4.5\times {10}^{22}$ per ${\mathrm{m}}^3$. Then, the electron density in doped germanium is nearly,