Question

# A thin metallic spherical shell contains a charge Q on its surface. A point charge q1 is placed at the centre of the shell and another charge q2 is placed outside the shell. All the three charges are positive. Then, the force on charge q1 is A
Towards left
B
Towards right
C
Upward
D
Zero
Solution
Verified by Toppr

#### Step 1: Electrostatic ShieldingDue to Electrostatic shielding, The metallic spherical shell acts as a shield and do not allow the electric field due to outside charges to penetrate through it.Hence, electric field inside shell due to Q and q1 is zero.Therefore, no force will act on charge q.Hence, Correct answer is (D)Note : Electrostatic shielding acts in case of closed metallic surfaces with cavity in which external field does not effect internal contents and internal field does not effect external contents.

2
Similar Questions
Q1

Three concentric metallic spherical shells of radii R, 2R, 3R are given charges Q1, Q2, Q3 respectively. It is found that the surface charge densities on the outer surfaces of the shells are equal. Then, the ratio of the charges given to the shells Q1 : Q2 : Q3 is

View Solution
Q2

A conducting shell of inner radius R1 and outer radius R2 is given a charge +Q. A point charge q1 is placed inside the shell and q2 is placed outside the shell. Then for various locations of q1 and q2, match the following entries of columnI with the entries of columnII.

 Column-I Column-II (i). If q1 is at center and q2=0 , then →E at center of shell due to charge on outer surface of shell is (a). q14πε0r2 (ii). If q1 is at center and q2 is at distance r from the center, then →E at a point distant r2 (>r) from the center of the shell due to outer surface charge is (b). Zero (iii). If q1 is not at center and q2=0 , then →E at point P (P is at distance r from q1 due to charge of the inner surface of shell) is (c). Cant be determined

View Solution
Q3

A thin metallic spherical shell contains a charge Q on its surface. A point charge q1 is placed at the centre of the shell and another charge q2 is placed outside the shell. All the three charges are positive. Then, the force on charge q1 is View Solution
Q4

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 the figure (30-Q1). All the three charges are positive. The force on the charge at the centre is
(a) toward left
(b) towards right
(c) upward
(d) zero View Solution
Q5

Inside a neutral metallic spherical shell, a charge Q1 is placed, and outside the shell, a charge Q2 is placed.

View Solution
Solve
Guides