A particle of mass `9xx10^-5` g is kept over a large horizontal sheet of charge having surface charge density `5x10^-5 C m^-2` What charge should be given to this particle so that if released, it does not fall down?

A charged particle having a charge of -3muC is placed close to a sheet of charge having a surface charge density 5xx10^-6 Cm^-2 . Find the force of attraction between the particle and the sheet of charge.

A uniformly charged conducting sphere of 2.5 m in diameter has a surface charge density of 100 muC/m^2 . Calculate the charge on the sphere.

An electric dipole AB consists of charge +-5 separated by a distance of 2xx10^-3m The dipole is placed near a long line charge having linear charge density 4.5 xx 10^-4C m^-1 , such that the negative charge is at a distance OA = 2.5 cm from the line charge. Find the force acting on the dipole.

A large plane sheet of charge having surface charge density 5.0 xx 10^-16 C m^-2 lies in the XY-plane . Find the electric flux through a circular area of radius 0.1 m , if the normal to the circular area makes an angle of 60^@ with the Z-axis. Given that epsilon_0 = 8.85 xx 10^-12 C^2N^-m^-2

A uniformly charged conducting sphere of 2.5 m in diameter has a surface charge density of 100 muC/m^2 . Calculate the total electric flux passing through the sphere.

The mass to charge ratio (m//e) for a cation is 1.5xx10^(-8) kg//C. What is the mass of this cation?

A particle of mass 10^-3 kg and charge 5 muC is thrown at a speed 20 ms^-1 against a uniform electric field of strength 2xx 10^5 NC^-1 , How much distance will it travel before coming to rest momentarily?

A drop of water of mass 18xx10^-3 g falls away from the bottom of a charged conducting sphere of radius 20 cm, carrying with it a charge of 10^(-9)C and leaving on the sphere a uniformly distributed charge of 2.5xx10^(-6)C . What is the speed of the drop after it has fallen 30 cm? (4piepsi_(0))^(-1)=9xx10^(9)JmC^(-2)