Electric Charges and Fields Test - 2

A bird sitting on a high power line

A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V . The potential at a distance of 2 cm from the centre of the sphere is

Two plates are 1 cm apart , and low potential difference between them is 10 volt . The electric field between the plates is

Two deutrons are separated by a distance r m , and have coulomb force = F . Two alpha particles separated by 2r metre will have a force equal to

If n capacitors each of capacitance C are connected in series with a battery of V volt , then the energy stored in all the capacitors will be

Two equal point charges are fixed at x = - a and x = + a on the X-axis . Another point charge Q is placed at the origin . The change in the electrical potential energy of Q , when it is displaced by a small distance x along the X-axis , is approximately proportional to

Increasing the charge on the plates of a capacitor means

Two point charges + 8q and - 2q are located at x = 0 and x = L respectively . The location of a point on the x axis at which the net electric field due to these two point charges is zero is

When an electric dipole is placed in a uniform electric field , it experiences

A sphere of radius R has a uniform distribution of electric charge in its volume. At a distance x from its centre , for x < R , the electric filed is directly proportional to