A ring of radius R is having two charges `q` and `2q` distributed on its two half parts. The electric potentiasl at a point on its axis at a distance of `2sqrt2 R` from its centre is `(k=1/(4piepsilon_0))`

A sphere of radius R has a charge density sigma . The electric intensity at a point at a distance r from its centre is

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 has radius 30cm and a charge of 2nC .The electric potential on the axis of the ring at a distance of 40cm from its centre will be

A ring of radius R is charged uniformly with a charge +Q . The potential at a point on its axis at a distance 'r' from any point on ring will be-

A non-conducting sphere of radius R is given a charge Q. Charge is uniformly distributed in its volume. The electric potential at centre and at the surface of sphere respectively are

A non-conducting sphere of radius R is given a charge Q. Charge is uniformly distributed in its volume. The electric potential at centre and at the surface of sphere respectively are

If charge q is induced on outer surface of sphere of radius R, then intensity at a point P at a distance S from its centre is

Charges q is uniformly distributed over a thin half ring of radius R . The electric field at the centre of the ring is

A ring of radius r has a uniformly spread charge + q on quarter of its circumference. The opposite quarter of the ring carries a charge – q uniformly spread over it. Find the electric potential at a point A shown in the figure. Point A is at a distance R(gtgt r) from the centre of the ring.