Question

An uncharged conducting sphere of radius $2R$ is joined to a charged conducting sphere of radius $R$ carrying charge $Q$. The charge which flows between them is :

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

Answer 1

Answer: (A)

$\frac{Q}{3}$

Radius $=2R$

Conducting sphere of radius $=R$

Carrying Charge $=Q$

The Charge which flows between them,

$2R+R=3R$

Now, $Q/3$