addietreed6347 addietreed6347
  • 03-07-2018
  • Physics
contestada

A 5.00-μf parallel-plate capacitor has charges of 30.0 μc on its plates. how much potential energy is stored in this capacitor?

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skyluke89
skyluke89 skyluke89
  • 12-07-2018
The potential energy stored by a capacitor is given by:
[tex]U= \frac{1}{2} \frac{Q^2}{C} [/tex]
where Q is the charge stored in the capacitor and C is the capacitance.

In this problem, 
[tex]Q=30.0 \mu C=30.0 \cdot 10^{-6} C[/tex]
[tex]C=5.0 \mu F=5.0 \cdot 10^{-6} F[/tex]
Therefore, the potential energy stored in the capacitor is
[tex]U= \frac{1}{2} \frac{(30.0 \cdot 10^{-6}C)^2}{5.0 \cdot 10^{-6}F}=9.0 \cdot 10^{-5} J [/tex]
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