Semicircular ring of radius 0.5 m is uniformly charged with a total charge of `1.4 xx 10^(-9) C`. The electric field intensity at centre of this ring is :-

A semicircular ring of radius 0.5 m is uniformly charged with a total charge of 1.5 xx 10^(-9) coul. The electric potential at the centre of this ring is :

A thin half- ring of radiusb 20 cm is uniformly charged with a total charge of 0.7 nC . Find the magnitude of the electric field at the centre of the centre of the half-ring.

A thin half ring of radius R = 20 cm is uniformly charged with a total charge q = 0.70 nC .Find the magnitude of the electric field strength at the curvaite centre of this half-ring.

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

A quarter ring of radius R is having uniform charge density lambda . Find the electric field and potential at the centre of the ring.

A semicircular are of radius a is charged uniformly and the charge per unit length is lambda . The electric field at its centre is

A ring of charge with radius 0.5m has 0.002 pi m gap. If the ribg carries a charge of +1 C the electric field at the center is

A conducting ring of radius 40 cm has a charge of 5 xx 10^(-9) C uniformly distributed over it. Calculate the electric field intensity at a point P, 40 cm away from the centre on the axis of the ring.

A charge Q is uniformly distributed only on the fourths portion of a ring of radius R . The elctric potential at centre of ring is

A thin circular ring of radius r is uniformly charged over its length.Consider two points the centre of ring 0 and a point P on the axis of the ring at a distance a from the centre of the ring.If ratio of potential at points 0 and P is (V_(0))/(V_(p))=(sqrt(10))/(1) then value of (a)/(r) is