Question

The spheres A, B and C have radii R, R and 2R respectively. Initially A has charge -Q, B is neutral and C has charge such that its surface charge density equals that of A. After contact and separation, charges are:

• A. $\frac{5Q}{4}, \frac{5Q}{4}, \frac{5Q}{2}$
• B. $Q, Q, Q$
• C. $\frac{6Q}{5}, \frac{6Q}{5}, \frac{12Q}{5}$
• D. $\frac{3Q}{4}, \frac{3Q}{4}, \frac{3Q}{2}$

Hint:

After contact, charges distribute in ratio of radii for conductors.

Answer 1

The Correct Option is C