Question

Explain the principle of a device that can build up high voltage of the order of few million volts
Draw a schematic diagram and explain the working of this device
Is there any restriction on the upper limit of high voltage set up in this machine? Explain.
OR
(a) Define electric flux. Write its S.I units
(b) Using Gauss's law, prove that the electric field at a point due to a uniformly charge infinite plane sheet is independent of the distance from it
(c) How is the field directed if (i) the sheet is positively charged,(ii) negatively charged?

Answer 1

In electromagnetism, electric flux is the measure of flow of the electric field through a given area.

Gauss' Law:- The total of the electric flux out of a closed surface is equal to the charge enclosed divided by the permittivity.

$\oint \overrightarrow{E}.\hat{n}ds=\frac{q_{enc}}{{ϵ}_0}$

Electric flux has SI unit colt-metre $\left(Vm\right)$.