A particle a having a charge of `5.0 xx 10 ^(-7) C` is fixed in. a vertical wall. A second particle B of mass 100 g and. having equal charge is supended by a silk thread. of length 30 cm form the wall. The point of suspension is. 30 cm above the particle A. Find the angle of the thread. with the vertical when it stays in equilibrium.

A particle A having a charge of 2.0xx10 ^(-6) C is held fixed on a horizontal table. A second charged jparticle of mass 80g stays in equilibrium on the table at a distance of 10 cm from the firsst charge. The coefficient of friction between the table and this second jparticle is mu = 0.2 . find the range within which the charge of this second particle may lie.

A particle A having a charge 10 mu C is held fixed on a horizontal surface. A block of mass 80 g and having charge stays in equilibrium on the surface at a distance 3 cm from the first charge. The coefficient of friction between the surface and the block is mu = 0.5 . Find the range within which the charge on the block may lie.

Two small spheres, each of mass 0.1 gm and carrying same charge 10^(-9) C are suspended by threads of equal length from the same point. If the distance between the centres of the sphere is 3 cm, then find out the angle made by the thread with the vertical. (g=10 m//s^(2)) & tan^(-1) (1/100) =0.6^(º)

Two small identical balls P and Q, each of mass 0.866 g, carry identical charges and are suspended by two threads of equal length 50 cm each from the same point. At equilibrium, they are separated by a distance of 50 cm. Find the charge on each ball (in nearest integer in nC ).

A simple pendulum of mass m and charge +q is suspended vertically by a massless thread of length l. At the point of suspension, a point charge +q is also fixed. If the pendulum is displaced slightly from equilibrium position, its time period will be

A water particle of mass 10.0 mg and having a charge of 1.50 xx 10^(-6)C stays suspended in a room. What is the magnitude of electric field in the room ? What is its direction?

A particle of mass 100 gm and charge 2muC is released from a distance of 50 cm from a fixed charge of 5muC . Find the speed of the particle when its distance from the fixed charge becomes 3 m.

A particle of mass 100 gm and charge 2muC is released from a distance of 50 cm from a fixed charge of 5muC . Find the speed of the particle when its distance from the fixed charge becomes 3 m.