EXERCISE 2

Two conductors are at a very large difference of potential. What will happen if there is vacuum in the space between the conductors ?

Does the electric potential decrease or increase along an electric line of force ?

Will an electron in an electric field move towards higher potential or lower potential ? What the proton does?

How much work will be done by an external agent to turn an electric dipole of moment $P$ through 

(ii) $180°$ (end-for-end) and $360°$ from the direction of the electric field ?

How much work will be done by an external agent to turn an electric dipole of moment $P$ through 

(i) $90°$ (end-for-end) and $360°$ from the direction of the electric field?

We assume the potential of earth zero. Can it be assume $+100 volts ?$ What will be the effect of it on the measurement of electric potential at a point and that of potential difference ?

Two point charges $+10\mu \mathrm{C}$ and $-10\mu \mathrm{C}$ are separated by a distance of $40 \mathrm{cm}$ in air. Draw an equipotential surface of the system.

A charged particle $q$ is shot towards another charged particle $Q$ which is fixed, with a speed $v$. It approaches $Q$ upto a closest distance $r$ and then returns. If $q$ is shot with speed $2v$, the closest distance of approach would be