Textbook Question
At a given instant, a 2.4-A current flows in the wires connected to a parallel-plate capacitor. What is the rate at which the electric field is changing between the plates if the square plates are 1.60 cm on a side?
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31. Alternating Current
Capacitors in AC Circuits
Back31. Alternating Current
Capacitors in AC Circuits
- Multiple ChoiceThe peak current to and from a capacitor is i when the emf source has a peak voltage V and frequency f. What is the peak current to and from the capacitor if the frequency and peak voltage are doubled to 2f and , respectively?886views
- Textbook Question
A 0.30 μF capacitor is connected across an AC generator that produces a peak voltage of 10 V. What is the peak current to and from the capacitor if the emf frequency is 100 Hz?
624views - Multiple Choice
An AC source operates at a maximum voltage of 120 V and a frequency of 60 Hz. If it is connected to a 175 µF capacitor, what is the maximum charge stored on the capacitor?
1043views4rank - Multiple Choice
A 300 µF capacitor is connected to an AC source operating at an RMS voltage of 120 V. If the maximum current in the circuit is 1.5 A, what is the oscillation frequency of the AC source?
1208views4rank1comments - Multiple ChoiceAn AC circuit consists of a capacitor and an emf source with frequency . If the source is turned on at , and the first time the voltage across the capacitor reaches a maximum value is at , when is the first time the current in the capacitor is at a maximum?850views
- Multiple ChoiceAn AC circuit consists of a capacitor and an emf source with a peak voltage of 40 V. What is the frequency of the source if the peak current is ?687views
- Multiple ChoiceA low-pass RC filter has a resistor in series with a Capacitor. What is the crossover angular frequency?689views
- Textbook Question
A capacitor is connected to a 15 kHz oscillator. The peak current is 65 mA when the rms voltage is 6.0 V. What is the value of the capacitance C?
58views - Textbook Question
A 0.30 μF capacitor is connected across an AC generator that produces a peak voltage of 10 V. What is the peak current to and from the capacitor if the emf frequency is 100 kHz?
56views - Textbook Question
The peak current to and from a capacitor is 10 mA. What is the peak current if the emf frequency is doubled?
34views - Textbook Question
The peak current to and from a capacitor is 10 mA. What is the peak current if the emf peak voltage is doubled (at the original frequency)?
38views - Textbook Question
A capacitor has a peak current of 330 μA when the peak voltage at 250 kHz is 2.2 V. What is the capacitance?
62views - Textbook Question
A capacitor has a peak current of 330 μA when the peak voltage at 250 kHz is 2.2 V. If the peak voltage is held constant, what is the peak current at 500 kHz?
82views - Textbook Question
A 20 nF capacitor is connected across an AC generator that produces a peak voltage of 5.0 V. At what frequency f is the peak current 50 mA?
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