A capacitor charged from a 50 V d.c. supply is found to have charge of \( 10\,\mu\mathrm{C} \). The capacitance of the capacitor would be:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → \( 0.2\,\mu\mathrm{F} \)
Capacitance is the charge stored per unit potential difference, and a capacitor charged from a supply reaches the supply voltage.
\( \displaystyle C = \frac{Q}{V} = \frac{10\times10^{-6}\,\mathrm{C}}{50\,\mathrm{V}} = 2\times10^{-7}\,\mathrm{F} = 0.2\,\mu\mathrm{F} \)