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

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 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 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 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 ring of radius 0.1m is made out of thin metallic wire of area of cross section 10^(-6)m^(2) . The ring has a uniform charge of pi coulombs. Find the change in the radius of the rig when a charge of 10^(-8)C is placed at the center of the ring. Young's modulus of hte metal is 2xx10^(11)Nm^(-2) .

A conducting ring of mass 2kg and radius 0.5m is placed on a smooth plane. The ring carries a current of i=4A . A horizontal magnetic field B=10 T is switched on at time t=0 as shown in fig The initial angular acceleration of the ring will be .

A half ring of radius R has a charge of lambda per unit length. The electric force on 1C charged placed at the center is

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