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.

Calculate the magnitude of electric field intensity at a point 10 cm away from a line charge of linear charge density 5 mu C/m.

A charge of 17*7xx10^(-4)C is distributed over a large sheet of area 400 m^(2) . Calculate the electric field intensity at a distance of 10 cm from it.

Electric field intensity at point P due to charge distributed over a sphere is:

A spherical conductor of radius 10 cm has a charge of 3.2 x 10^-7 C distributed uniformly. What is magnitude of electric field at point 15 cm from centre of sphere?

A non - conducting ring of mass m = 4 kg and radius R = 10 cm has charge Q = 2 C uniformly distributed over its circumference. The ring is placed on a rough horizontal surface such that the plane of the ring is parallel to the surface. A vertical magnetic field B=4t^(3)T is switched on at t = 0. At t = 5 s ring starts to rotate about the vertical axis through the centre. The coefficient of friction between the ring and the surface is found to be (k)/(24) . Then the value of k is

A charge of 17.7 xx 10^(-4)C is distributed uniformly over a large sheet of area 200 m^(2) . The electric field intensity at a distance 20 cm from it in air will be