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4.6.2 Power Dissipation in an Ideal Dielectric
Since the instantaneous power drawn by the dielectric from the voltage sources is IcV, the time-average power dissipated, Pavj, in a dielectric is given as
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(4.57) |
where Γ is the time period is given as  .
For an ideal dielectric with no loss of charging current, the power dissipated inside the dielectric must be zero, i.e.
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(4.58) |
What it means is that during the first cycle, the capacitor charges completely and during the other cycle it completely discharges without any loss of charge. It is like a mass perfectly oscillating under gravity on a perfect spring.
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