One end of a 10 cm long silk thread is fixed to a large vertical surface of a xharged nonconducting plate and the other end is fastened to a small ball having a mass of 10 g and charge of `4.0 xx 10^ C`. In equilibrium, the thread make an angle of `60^0` with the vertical. Find the surface charge dendity on the plate.

One end of a 10 cm long silk thread is fixed to a large vertical surface of a charged non conducting plate and the other end is fastened to a small ball having a mass of 10 g and charge of 4.0 xx 10^ C . In equilibrium, the thread make an angle of 60^0 with the vertical. Find the surface charge density on the plate.

One end of a 10 cm long silk thread is fixed to a large vertical surface of a charged non conducting plate and the other end is fastened to a small ball having a mass of 10 g and charge of 4.0 xx 10^ C . In equilibrium, the thread make an angle of 60^0 with the vertical. Find the surface charge density on the plate.

One end of a 10 cm long skill thread is fixed to a large vertical surface of a charged nonconducting plate and the other end ise fastened to a small ball having a mass of 10 g and a charge of 4.0 xx 10^(-6)C . In equilibrium, the thread makes an angle of 60^(@) with the vertical. Find the surface charge density on the plate.

One end of a 10 cm long skill thread is fixed to a large vertical surface of a charged nonconducting plate and the other end ise fastened to a small ball having a mass of 10 g and a charge of 4.0 xx 10^(-6)C . In equilibrium, the thread makes an angle of 60^(@) with the vertical. Find the tension in the string in equilibrium.

One end of a 10 cm long silk thread is fixed to a large vertical surface of a charged non-conducting plate and the other end is fastened to a small ball of mass 10 g and charge of 4 xx 10^(-6) C . In equilibrium, thread makes an angle of 60^(o) with the vertical. (a) Find the tension in the string in equilibrium. (b) Suppose the ball is slightly pushed aside and released. Find the time period of the small oscillations. (Use sigma=7.5xx10^(-7) C/m^2 )

A 1 mg ball carrying a charge of 2xx10^-8 C hangs from a thread. When a large conducting plate of charge is brought near the ball, the thread makes an angle of 30^@ with the plate. What is the surface charge density of the plate?

A particle of mass m and charge q is suspended from a point A with a silk thread of length l. Another particle of charge -q is fixes at a distance I from the point A such that point A and the charge -q lie in same horizontal plane. If at equilibrium , the thread makes angle 30^(@) with vertical, find the mass m and tension in the thread . ( Take acceleration due to gravity as g).

A particle of mass m and charge q is suspended from a point A with a silk thread of length l. Another particle of charge -q is fixes at a distance I from the point A such that point A and the charge -q lie in same horizontal plane. If at equilibrium , the thread makes angle 30^(@) with vertical, find the mass m and tension in the thread . ( Take acceleration due to gravity as g).

If a small sphere of mass m and charge q is hung from a silk thread at an angle theta with the surface of a vertical charged conducting plate, then for equilibrium of sphere, the surface charge density of the plate is