A fixed ring of radius R has positive charge Q distributed uniformly on it.At a distance x from centre on its axis,(consider axial points only) find the electric potential.

A thin semi-circular ring of radius r has a positive charge q distributed uniformly over it. The net field vecE at the centre O is

Consider a sphere of radius R having charge q uniformly distributed insider it. At what minimum distance from surface the electric potential is half of the electric potential at its centre?

consider a nonconducting ring of radius r and mass m which has a total charge q distributed uniformly on it the ring is rotated about its axis with an angular speed omega . (a) Find the equivalent electric current in the ring (b) find the magnetic moment mu of the . (c) show that mu=(q)/(2m) where l is the angular momentum of the ring about its axis of rotation.

A ring of radius a contains a charge q distributed. uniformly ober its length. Find the electric field at a point. on the axis of the ring at a distance x from the centre.

A ring of radius R has charge -Q distributed uniformly over it. Calculate the charge that should be placed at the center of the ring such that the electric field becomes zero at apoint on the axis of the ring at distant R from the center of the ring.

A solid sphere of radius R has charge q uniformly distributed over its volume. The distance from its surface at which the electrostatic potential is equal to half of the potential at the centre is

A solid sphere of radius R has charge q uniformly distributed over its volume. The distance from it surfce at which the electrostatic potential is equal to half of the potential at the centre is

A solid sphere of radius R has charge q uniformly distributed over its volume. The distance from it surfce at which the electrostatic potential is equal to half of the potential at the centre is

An insulating solid sphere of radius R has a uniformly positive charge density rho . As a result of this uniform charge distribution there is a finite value of electric potential at the centre of the sphere, at the surface of the sphere and also at a point out side the sphere. The electric potential at infinity is zero. Statement-1: When a charge 'q' is taken from the centre to the surface of the sphere, its potential energy changes by (qrho)/(3 in_(0)) Statement-2 : The electric field at a distance r (r lt R) from the centre of the the sphere is (rho r)/(3in_(0))

A solid conducting sphere of radius r is having a charge of Q and point charge q is a distance d from the centre of sphere as shown. The electric potential at the centre of the solid sphere is :