Question

The ratio of the energies stored in capacitors \(A\), \(B\) and \(C\) when connected in parallel to a dc supply is \(1:2:3\). When they are connected in series to the same dc supply, if the energy stored in capacitor \(C\) is \(75\,\text{mJ}\), then the energy stored in capacitor \(A\) is

• A. \(150\,\text{mJ}\)
• B. \(25\,\text{mJ}\)
• C. \(225\,\text{mJ}\)
• D. \(75\,\text{mJ}\)

Hint:

Remember, \[ \boxed{ U=\frac12CV^2 } \] for capacitors connected across the same voltage, and \[ \boxed{ U=\frac{Q^2}{2C} } \] for capacitors carrying the same charge (series connection).

Answer 1

The Correct Option is C