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178. A fully charged capacitor has acapacitance C. It is discharged through asmall coil of resistance wire embedded in athermally insulated block of specific heatcapacity s and mass m. If the temperature ofthe block is raised by AT, the potentialdifference V across the capacitances is:(a) SAT16) maar(0) Antar |
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Answer» The electrical potential energy stored in the capacitor is = C V² /2 This energy is dissipated in the circuit through the resistance wire. That heat is absorbed by the insulated block. Apply conservation of energy : Heat absorbed = m sΔT = C V² /2 => V = √[2 m sΔT /C] |
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