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Capacitors

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Question 17

A capacitor is discharged through a resistor. At time t=0t = 0t=0 the current in the circuit is I0I_0I0​. At time t=4.0 st = 4.0\text{ s}t=4.0 s, the current has decreased to 0.70I00.70 I_00.70I0​.

Which statement about the circuit is not correct?

At t=8.0 st = 8.0\text{ s}t=8.0 s, the potential difference across the capacitor is 0.490.490.49 of its initial value.

At t=4.0 st = 4.0\text{ s}t=4.0 s, the rate of electrical energy dissipation in the resistor is 0.700.700.70 of its initial value.

At t=12.0 st = 12.0\text{ s}t=12.0 s, the charge stored on the capacitor is approximately 34%34\%34% of its initial value.

The time constant of the discharging circuit is approximately 11 s11\text{ s}11 s.

Capacitors Questions

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  3. /Capacitors