A and B are two conducting concentric spherical shells. A i…

Physics Electrostatics Potential & Capacitance Conductor, It's Properties & Electric Pressure MCQ (Single Correct)

A and B are two conducting concentric spherical shells. A is given a charge Q while B is uncharged. If now B is earthed as shown in figure. Then:

The charge appearing on inner surface of B is -Q

The field inside and outside A is zero.

The field between A and B is not zero.

The charge appearing on outer surface of B is zero.

Text Solution

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The correct answer is:

CHECK THE SOLUTION.

(a, c, d)

(i) Due to earthing

Let total charge on B is q.

V B = 0

∴

Or q = –Q.

(ii) ∴ All charge q = – Q

appears on inner surface of B due to induction

⇒ Charge on outer surface of B = 0

⇒ Field between A and B due to B = 0

Field between A and B due to A = 0

Net field between A and B = 0.

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