Capacitor Stored Energy Formula |
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\( U \;=\; \dfrac{ C \cdot V^2 }{ 2 }\) (Capacitor Stored Energy) \( C \;=\; \dfrac{ 2 \cdot U }{ V^2 }\) \( V \;=\; \sqrt{ \dfrac{ 2 \cdot U }{ C } }\) |
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| Symbol | English | Metric |
| \( U \) = Stored Energy | \(lbf - ft\) | \(J\) |
| \( C \) = Capacitance | - | \(s^4-A^2\;/\;kg-m^2\) |
| \( V \) = Voltage Potential Difference | \(V\) | \(V\) |
A capacitor stores energy in the form of an electric field that is created between its conductive plates when a voltage is applied across it. This electric field is a result of the accumulation of electric charges on the plates, with one plate holding a positive charge and the other an equal amount of negative charge. The energy stored in this electric field is a form of potential energy, as the separated charges have the potential to do work if allowed to flow back together. The amount of energy a capacitor can store is directly proportional to its capacitance and the square of the voltage across it. This stored energy can then be released when the capacitor is discharged, making it a useful component in various electrical circuits for applications such as energy storage, filtering, and timing.
Capacitor Stored Energy Formula |
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\( U \;=\; \dfrac{ Q^2 }{ 2 \cdot C }\) (Capacitor Stored Energy) \( C \;=\; \dfrac{ Q^2 }{ 2 \cdot U }\) \( Q \;=\; \sqrt{ 2 \cdot U \cdot C }\) |
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| Symbol | English | Metric |
| \( U \) = Stored Energy | \(lbf - ft\) | \(J\) |
| \( C \) = Capacitance | - | \(s^4-A^2\;/\;kg-m^2\) |
| \( Q \) = Electric Charge | - | \( A-s \) |
Capacitor Stored Energy Formula |
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\( U \;=\; \dfrac{ Q \cdot V }{ 2 }\) (Capacitor Stored Energy) \( C \;=\; \dfrac{ 2 \cdot U }{ V }\) \( V \;=\; \dfrac{ 2 \cdot U }{ Q }\) |
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| Symbol | English | Metric |
| \( U \) = Stored Energy | \(lbf - ft\) | \(J\) |
| \( Q \) = Electric Charge | - | \( A-s \) |
| \( V \) = Voltage Potential Difference | \(V\) | \(V\) |