A capacitor with capacitance C is completely charged using an external voltage V

Question

A capacitor with capacitance C is completely charged using an external voltage V. The energy stored in this capacitor is equal to U1=CV^2/2. (a) What would be the energy U2 stored in two capacitors (combined) if we add another identical capacitor connected in series with the first one and keep the external voltage unchanged? U2/U1= 1.1/4 2.2 3. 1 4.4 5. 1/2 (b) What would be the energy U2 stored in two capacitors (combined) if we add another identical capacitor connected in parallel with the first one and keep the external voltage unchanged? U2/UI = I. 1 2.2 3. 1/4 4. 1/2 5.4

Explanation / Answer

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