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.

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 point charge q is located at the centre fo a thin ring of radius R with uniformly distributed charge -q , find the magnitude of the electric field strength vectro at the point lying on the axis of the ring at a distance x from its centre, if x gt gt R .

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 :

Consider a circular ring of radius r, uniformly charged with linear charge density lambda . Find the electric potential aty a point on the exis at a distance x from the centre of the ring. Using this expression for the potential, find the electric field at this point.

A sphere of radius R, is charged uniformly with total charge Q. Then correct statement for electric field is (r = distance from centre): -

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

Consider a uniformly charged ring of radius R. Find the pint on the axis where the electrie field is maximum.

A ring of radius R is with a uniformly distributed charge Q on it .A charge q is now placed in the centre of the ring .Find the increment in tension in the ring.