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Electrostatics — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectrostatics1 Mark
MCQ
A solid conducting sphere of radius $R_1$ is surrounded by another concentric hollow conducting sphere of radius $R_2$. The capacitance of this assembly is proportional to
  • A
    $\frac{R_2-R_1}{R_1 R_2}$
  • B
    $\frac{R_2+R_1}{R_1 R_2}$
  • C
    $\frac{R_1 R_2}{R_1+R_2}$
  • ✓
    $\frac{R_1 R_2}{R_1-R_2}$
✓

Answer

Correct option: D.
$\frac{R_1 R_2}{R_1-R_2}$
(d) $\frac{R_1 R_2}{R_1-R_2}$

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