Question

Concentric conducting shells are shown in figure. Potential drop between spheres is
$V_0$. If charge on outer shell is tripled and charge on inner shell is doubled, then new potential drop between spheres is

• A. $\frac{3V_0}{2}$
• B. $6V_0$
• C. $\frac{{\mathrm{5V}}_0}{2}$
• D. $2V_0$

Answer 1

The correct option is D $2V_0$

Potential in between the shell does not depend on the charge on the outside shell. However, it is proportional to the charge on the inside sphere. So, as the charge on the inside sphere is doubled, the potential difference is also doubled.