Energy stored by a capacitor:

$\overline{){\mathbf{U}}{\mathbf{=}}\frac{\mathbf{C}{\mathbf{V}}^{\mathbf{2}}}{\mathbf{2}}{\mathbf{=}}\frac{\mathbf{Q}\mathbf{V}}{\mathbf{2}}{\mathbf{=}}\frac{\mathbf{Q}}{\mathbf{2}\mathbf{C}}}$

U_{C1} = 0.5CV^{2}

Capacitor 2 has half the capacitance and twice the potential difference as capacitor 1. What is the ratio Uc_{1}/Uc_{2}.

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