Two similar conducting balls having charges $+q$ and $-q$ are placed at a separation $d$ from each other in air. The radius of each ball is $r$ and the separation between their centres is $d(d > > r)$. Calculate the capacitance of the two ball system
Two similar conducting balls having charges $+q$ and $-q$ are placed at a separation $d$ from each other in air. The radius of each ball is $r$ and the separation between their centres is $d(d > > r)$. Calculate the capacitance of the two ball system
- A
$4 \pi \varepsilon_0 r$
- B
$2 \pi \varepsilon_0$
- C
$4 \pi \log _e \frac{\varepsilon_0 r}{d}$
- D
$4 \pi \log _e \frac{r}{d}$
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