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Ipshita Biswas Grade: 12

Suppose a capacitor of capacitance C, which is already charged Q is connected  to a battery of voltage less than Q/C,in a closed circuit,...what happens? Can charges flow to the battery???

7 years ago

Answers : (1)

suryakanth AskiitiansExpert-IITB
105 Points

Dear ipshita,

Yes the capacitor can charge a battery. but it is very insignificant amount.Considering the practical values generally used.The energy of a capacitor is generally a fraction of a Joule (220 uF 15Volt = 25 milliJoules) -- that "charge" to the battery is fairly insignificant. Even a supercapacitor at 1F, 12V is only 72 Joules. That's not much compared to 72 kiloJoules, or 72 MegaJoules energy of the battery.

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Askiitians Expert

Suryakanth –IITB

7 years ago
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