Why is electrostatic potential constant throughout the volume of the conductor and has the same value (as inside) on its surface ?

Predict the direction of induced current in metal rings 1 and 2 when current I in the wire is steadily decreasing ?

The relative magnetic permeability of a magnetic material is 800. Identify the nature of magnetic material and state its two properties.

Two identical circular loops, P and Q, each of radius r and carrying equal currents are kept in the parallel planes having a common axis passing through O. The direction of current in P is clockwise and in Q is anti-clockwise as seen from O which is equidistant from the loops P and Q. Find the magnitude of the net magnetic field at O.

A rectangular loop of wire of size 2.5 cm × 4 cm carries a steady current of 1 A. A straight wire carrying 2 A current is kept near the loop as shown. If the loop and the wire are co-planar, find the
(i) torque acting on the loop and
(ii) the magnitude and direction of the force on the loop due to the current carrying wire.