Two spheres $A$ and $B$ of radius $a$ and $b$ respectively are at same electric potential. The ratio of the surface charge densities of $A$ and $B$ is
Two spheres $A$ and $B$ of radius $a$ and $b$ respectively are at same electric potential. The ratio of the surface charge densities of $A$ and $B$ is
- A
$\frac{a}{b}$
- B
$\frac{b}{a}$
- C
$\frac{{{a^2}}}{{{b^2}}}$
- D
$\frac{{{b^2}}}{{{a^2}}}$
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($1$) The value of $R$ is. . . . meter.
($2$) The value of $b$ is. . . . . .meter.
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($2$) The value of $b$ is. . . . . .meter.
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