Two metal spheres of radius R and 3R have same surface charge den… | JEE Main 2025 Physics PYQ

MCQMediumJEE Main 2025 · 8 April, Shift 2Capacitors & Dielectrics

Two metal spheres of radius $R$ and $3R$ have same surface charge density $\sigma$ . If they are brought in contact and then separated, the surface charge density on smaller and bigger sphere becomes $\sigma_1$ and $\sigma_2$ , respectively. The ratio $\frac{\sigma_1}{\sigma_2}$ is:

A
$9$
B
$\frac{1}{3}$
C
$\frac{1}{9}$
D
$3$

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