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Spherical (1989)

Duration: 1:37

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A spherical capacitor consists of two concentric spherical conductors, held in position by suitable insulating supports as shown in figure. The
\( \mathrm{P} \)
W capacitance \( C \), of this spherical capacitor is
(a) \( \frac{4 \pi \varepsilon_{o} r_{1} r_{2}}{r_{1}-r_{2}} \)
(b) \( \frac{4 \pi \varepsilon_{o}\left(r_{2}-r_{1}\right)}{r_{1} r_{2}} \)
(c) \( \frac{r_{1} r_{2}}{4 \pi \varepsilon_{o}\left(r_{2}-r_{1}\right)} \)
(d) \( \frac{\left(r_{1}-r_{2}\right)}{4 \pi \varepsilon_{o} r_{1} r_{2}} \)
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