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 q1 is placed outside it as shown in figure (30-Q1). All the three charges are positive. Theforce on the charge at the centre is(a) towards left (b) towards right(c) upward (d) zero.

A thin, metallic spherical shell contains a charge Q on it. A point ch

1.	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 q1 is placed outside it as shown in figure (30-Q1). All the three charges are positive. Theforce on the charge at the centre is(a) towards left (b) towards right(c) upward (d) zero.
Answer» The correct answer is (d) zero.