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The **energy stored** in a **capacitor** can be expressed in three ways: Ecap=QV2=CV22=Q22C E cap = Q V 2 = C V 2 2 = Q 2 2 C , where Q is the charge, V is the voltage, and C is the **capacitance** of the **capacitor**. The **energy** is in joules for a charge in coulombs, voltage in volts, and **capacitance** in farads.

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The energy stored in a capacitor is equal to 1/2 CV2 where C is the capacitance (in farads) and V is the voltage (in volts). In this case, the value of C is 15 μf and the value of V is 380 V.

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A 15 microfarad capacitor is charged to a voltage of 380 volts.

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