Two spheres A and B are charged with the charges of +10 and +20 coulomb respectively and separated by a distance of 80 cm. The electric field at point on the line joining the centres of the two spheres will be zero at a distance from the sphere A :

Two spheres A and B of radii 17 cm each and having charges of 1 and 2 coulombs respectively are separated by a distance of SO cm. The electric field at a point on the line joining the centres of two spheres is approximately zero at some distance from the sphere A. The electric potential at this point is:

Two charges of 1.0xx10^(-6) coulomb are separated by a distance 10 cm . Where will the electric field be zero on the line joining the two charges ?

Two spheres A and B are having radii 5 cm and 10 cm and carrying charges of +5C and +15 C respectively, distributed uniformaly. Their centres are separated by 80 cm. The electric field on the line joining the centres of the spheres will be zero at a distance from the centre of A equal to

Two heavy spheres of mass m are kept separated by a distance 2r. The gravitational field and potential at the midpoint of the line joining the centres of the spheres are

Two heavy spheres of mass m are kept separated by a distance 2r. The gravitational field and potential at the midpoint of the line joining the centres of the spheres are

Two point charges +Q and -Q are separated by a certain distance. The resultant electric field is parallel to the line joining the charges at the points

Two spheres of radius a and b respectively are charged and joined by a wire. The ratio of electric field of the spheres is