Embibe Experts Solutions for Chapter: Electrostatics, Exercise 2: Exercise-2

Three large plates are arranged as shown. How much charge will flow through the key $K$ if it is closed?

An observer $A$ and a charge $Q$ are fixed in a stationary frame $F_1$. An observer $B$ is fixed in a frame $F_2$, which is moving with respect to $F_1$.

A unit positive point charge of mass $m$ is projected with a velocity v inside the tunnel as shown. The tunnel has been made inside a uniformly charged non-conducting sphere of volume charge density $\rho$. The minimum velocity with which the point charge should be projected such that it can it reach the opposite end of the tunnel, is equal to:

Three concentric conducting spherical shells have radius $r,2\mathrm{r}$ and $3\mathrm{r}$ and $Q_1,Q_2$ and $Q_3$ are final charges, respectively. Innermost and outermost shells are already earthed as shown in figure. choose the wrong statement.

In the previous question assume that the electrostatic potential is zero at an infinite distance from the spherical shell. The electrostatic potential at a distance $R$ $\left(a<R<b\right)$ from the centre of the shell is where $\left(K=\frac{1}{4\pi {\epsilon }_0}\right)$

$X$ and $Y$ are large, parallel conducting plates closed to each other. Each face has an area $A.X$ is given a charge $Q$. $Y$ is without any charge. Points $A,B$and $C$ are as shown in figure:

Plates $A$ and $B$ constitutes an isolated, charge parallel plate capacitor. The inner surfaces (I and IV) of $A$ and $B$ have charges $+Q$ and $-Q$ respectively. $A$third plate $C$ with charge $+Q$ is now introduced midway between $A$ and $B$. Which of the following statements is not correct?

A positive point charge is placed at $P$ in front of an earthed metal sheet $S·Q$ and $R$ are two points between $P$ and $S$ as shown in the diagram. If the electric field strengths at $Q$ and $R$ are respectively $E_Q$ and $E_R$, which one of the following statements is/are false?