An unknown capacitor has a potential of 18 V across the plates; the amount of charge on one of the plates is 4.7 mC. The potential energy stored in the capacitor is
A) 71 mJ.
B) 8.5 mJ.
C) 130 mJ.
D) 42 mJ.

Question

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The Answer of An unknown capacitor has a potential of 18 V across the plates; the amount of charge on one of the plates is 4.7 mC. The potential energy stored in the capacitor is
A) 71 mJ.
B) 8.5 mJ.
C) 130 mJ.
D) 42 mJ.

An Unknown Capacitor Has a Potential of 18 V Across