31. Alternating Current
Capacitors in AC Circuits
31. Alternating Current
Capacitors in AC Circuits
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- 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?
- 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?
- 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?
- 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?
- Open QuestionA 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 (a) 100 Hz?
- Open QuestionThe small transformers that power many consumer products produce a 12.0 V rms, 60 Hz emf. Design a circuit using resistors and capacitors that uses the transformer voltage as an input and produces a 6.0 V rms output that leads the input voltage by 45°.