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A capacitor is charged so that it has a stored potential energy U and then connected in series with an identical, uncharged capacitor and a resistance. Until the current in the circuit becomes negligible, the total heat wasted in the resistance is H. The ratio (H)/(U) is______. |
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Answer» So, `U=(Q^(2))/(2C)` When the final steady state is achieved, both capacitors have charge Q/2. so, potential energy stored in any one capacitor, `U'=(((Q)/(2))^(2))/(2C)=(Q^(2))/(8C)`, so, heat washed in the resistance, `H=U-2U'=(Q^(2))/(4C)` |
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