Explain why, under very low frequency ac conditions, a capacitor acts almost as an open circuit while an inductor acts almost as a short circuit.
Answer to relevant QuestionsCan an inductor oppose dc current? What about a capacitor? Explain each and why they are different. A50-kW electric heater is designed to run using a 240-V ac source. Find its (a) Peak current and (b) Peak voltage. (c) How much energy will you be billed for in a 30-day month if it operates 2.0 h per day? How much current is in a circuit containing only a 50-μF capacitor connected to an ac generator with an output of 120 V and 60 Hz? (a) What inductance has the same reactance in a 120-V, 60-Hz circuit as a capacitance of 10 μF? (b) What would be the ratio of inductive reactance to capacitive reactance if the frequency were changed to 120 Hz? A series RLC circuit has a resistance of 25-Ω, an inductance of 0.30 H, and a capacitance of 8.0μF. (a) At what frequency should the circuit be driven for the maximum power to be transferred from the driving source? (b) ...
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