MCQ
The capacity of a parallel plate condenser is $C$. Its capacity when the separation between the plates is halved will be
- A$4C$
- ✓$2C$
- C$\frac{C}{2}$
- D$\frac{C}{4}$
✓
Answer
Correct option: B.
$2C$
b
(b) $C = \frac{{{\varepsilon _0}A}}{d}.\,C' = \frac{{{\varepsilon _0}A}}{{d/2}}$ $==>$ $8{r^3} = {R^3}$
(b) $C = \frac{{{\varepsilon _0}A}}{d}.\,C' = \frac{{{\varepsilon _0}A}}{{d/2}}$ $==>$ $8{r^3} = {R^3}$
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