The electrostatic force on a small sphere of charge `0.4muC` due to another small sphere of charge `-0.8muC` in air is 0.2N
What is the force on the second sphere due to the first ?

The electrostatic force on a small sphere of charge 0.4muC due to another small sphere of charge -0.8muC in air is 0.2N What is the distance between the two spheres ?

The mass of a metal sphere charged with +20 esu is 2g. Another smaller sphere with -128 esu of charge is suspended with a thread. The former sphere, just below this smaller one, is at rest. What is the distance between the centres of the two spheres? g="980 cm . s"^(-2)

If a solid large sphere is made by melting three small gold-sphere of radii 3 mm , 4mm, and 5mm, then what will be the radius of the large sphere?

A uniformly charged conducting sphere of 2.4 m diameter has a surface charge.density of 80.0muC//m^2 What is the total electric flux leaving the surface of the sphere ?

Two sphere M and N, having charge q_(1) and q_(2) are kept at some distance from each other.q amount of charge is taken from the sphere M and transferred ot the sphere N. What is the new charge of the two spheres so that the force acting between them becomes maximum?

A metal sphere of radius 10 cm is charged up to a potential of 80 esu. After sharing its chage with another sphere, the common potential of them becomes 20 esu. What is the radius of the second sphere ?

The electric intensity due to dipole of length 10 cm and having a charge of 500muC , at a point on the axis 20 cm from one of the charges in air is

Two insulated metal spheres of the same size are charged with -15 esu and +25 esu. The distance between their centres is 10 cm. What is the force acting between the two charges? If the two spheres are made to touch each other and then placed in their previous positions, what will be the force acting between them?