A mass m carrying a charge `q` si suspended form a string and placed in a uniform horizontal electric field of intensity `E`.The angel made by the string with the vertical in the equilibrium position is

A pendulum bob of mass m , carrying a charge q is at rest with its string making an angle theta with the vertical in a uniform horizontal electric field E. the tension in the string is

A positively charged particle of charge q and mass m is suspended from a point by a string of length l. In the space a uniform horizontal electric field E exists . The particle is drawn aside so that it is projected horizontally with velocity v such that the particle starts to move along a circle with same constant speed v. Find the speed v.

A small charged particle of mass m and charge q is suspended by an insulated thread in front of a very large conducting charged sheet of uniform surface density of charge sigma . The angle made by the thread with the vertical in equilibrium is

A uniform electric field of 3xx10^4 N/C is applied iin a horizontal direction . A pendulum bob of mass 90 mg and carrying a charge of 1.5xx10^(-8) C is suspended through a string of length 1m. Calculate tension developed in the string and the angle made by the string with the vertical .

A 0.50 gm ball carries a charge of magnitude 10mu C . It is suspended by a string in a downward electric field of intensity 300N/C. If the charge on the ball is positive, then the tension in the string is (g = 10 ms^(-2))