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A and B are two concentric spherical she...

A and B are two concentric spherical shells. If A is given a charge `+q` while B is earthed as shown in figure then

A

charge on the outer surface of shell B is zero

B

the charge on B is equal and opposite to that of A

C

the field inside A and outside B is zero

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
D
`V_B=0`
`:. (k_(q_A))/r_B+(k_(q_B))/r_B=0`
`:. q_B=-q_A=-q`
Charge distribution is as shown below.
From Gauss's theorem electric field at any point is given by
`E=(kq_("in"))/r^2`
`q_("in")` inside A outside B is zero. Therefore `E=0`
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