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WAEC - Physics (1992 - No. 48)
Calculate the energy stored in 20μF capacitor if the potential difference between the plates is 40 V.
3.2 x10
-2
J
1.6x10
2
J
8.0x10
-4
J
4.0x10
-4
J
2.0x10
-4
J
Paliwanag
E = 1/2cv
2
= 1/2 x 10 x 10
-6
x 40
2
= 1.6 x 10
-2
J
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