A conducting spherical shell is earthed. A positive charge `+q_1` is placed at the center and another small positive charge `+q_2` is placed at a distance r from `q_1`. Ignore the effect of induced charge due to `q_2` on the sphere. Then the coulomb force on `q_2` is

A positive point charge q_(1) is placed at (a,0) and another positive point charge q_(2) is placed at (0,a) . Find the force acting on q_(1) .

A positive point charge q_(1) is placed at (a,0) and another positive point charge q_(2) is placed at (0,a) . Find the force acting on q_(1) .

There is a cubical cavity inside a conducting sphere of radius R. A positive point charge Q is placed at the centre of the cube and another positive charge q is placed at a distance 1(gtR) from the centre of the sphere. The sphere is earthed Net charge on the outer surface of conducting sphere is

A thin metallic spherical shell contains a charge Q on its surface. A point charge q_1 , is placed at the center of the shell, and another charge q_2 is placed outside the shell. All the three charges are positive. Then the force on charge q, is

A thin metallic spherical shell contains a charge Q on it. A point charge q is placed at the centre of the shell and another charge q_(1) is placed outside it as shown in figure. All the three charges are positive The force on the charge at the centre is

A thin. Metallic spherical shell contains s charge Q on it. A point charge q is placed at the centre of the shell and another charge q_1 is placed outside it as shown in figure (30-Q1). All the three charges are positive. The force on the charge at the centre is

A thin. Metallic spherical shell contains s charge Q on it. A point charge q is placed at the centre of the shell and another charge q_1 is placed outside it as shown in figure (30-Q1). All the three charges are positive. The force on the charge at the centre is

A thin. Metallic spherical shell contains s charge Q on it. A point charge q is placed at the centre of the shell and another charge q_1 is placed outside it as shown in figure (30-Q1). All the three charges are positive. The force on the charge at the centre is

A thin metallic spherical shell contains a charge Q on it. A point charge q is placed at the center of the shell and another charge q_1 is placed outside it as shown in the figure. All the three charges are positive. Find the force on the charge a. at centre due to all charges. b. at center due to shell.