The charge given to any conductor resides on its outer surface, because
The free charge tends to be in its minimum potential energy state
The free charge tends to be in its minimum kinetic energy state
The free charge tends to be in its maximum potential energy state
The free charge tends to be in its maximum kinetic energy state
Four charges are arranged at the corners of a square $ABCD$ of side $d$, as shown in Figure
$(a)$ Find the work required to put together this arrangement.
$(b)$ A charge $q_{0}$ is brought to the centre $E$ of the square, the four charges being held fixed at its corners. How much extra work is needed to do this?
When a proton is accelerated through $1\,V$, then its kinetic energy will be.....$eV$
A proton is about $1840$ times heavier than an electron. When it is accelerated by a potential difference of $1\, kV$, its kinetic energy will be......$keV$
Positive and negative point charges of equal magnitude are kept at $\left(0,0, \frac{a}{2}\right)$ and $\left(0,0, \frac{-a}{2}\right)$, respectively. The work done by the electric field when another positive point charge is moved from $(-a, 0,0)$ to $(0, a, 0)$ is
There is a uniform spherically symmetric surface charge density at a distance $R_0$ from the origin. The charge distribution is initially at rest and starts expanding because of mutual repulsion. The figure that represents best the speed $V(R(t))$ of the distribution as a function of its instantaneous radius $R(t)$ is