Question

A long, hollow conducting cylinder is kept coaxially inside another long, hollow conducting cylinder of larger radius. Both the cylinders are initially electrically neutral.

• A. A potential difference appears between the two cylinders when a charge density is given to the inner cylinder
• B. A potential difference appears between the two cylinders when a charge density is given to the outer cylinder
• C. No potential difference appears between the two cylinders when a uniform line charge is kept along the axis of the cylinders
• D. No potential difference appears between the two cylinders when same charge density is given to both the cylinders

Answer 1

Answer: (A)

There will be an electric field between two cylinders (using Gauss theorem). This electric field will produce a potential difference.
$\therefore $ Correct answer is (a).