An air-filled parallel-plate capacitor is constructed with a plate area of 0.40 m2 and a plate separation of 0.10 mm. It is then charged to a potential difference of 12 V?
(?0 = 8.85 × 10-12 C2/N ? m2 )
(a) How much charge is stored on each of its plates?
(b) How much energy is stored in it?
(a) 0.42 µC (b) 2.5 µJ
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