Question

Two concentric spherical conducting shells of radii R and 2R carry charges Q and 2Q respectively. Change in electric potential on the outer shell when both are connected by a conducting wire is –

• A. Zero
• B. $\frac{3kQ}{2R}$
• C. $\frac{kQ}{R}$
• D. $\frac{2kQ}{R}$

Answer 1

Answer: (A)

Zero

Answer 2

Initial potential at outer shell

V₁ = + =

Final potential at outer shell is

V₂ =

\ DV = V₁ – V₂ = 0