Find the rms and peak currents in a 40-W, 120-V lightbulb. What is its resistance?
Answer to relevant QuestionsA50-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? A single 2.0-μF capacitor is connected across the terminals of a 60-Hz voltage source, and a current of 2.0 mA is measured on an ac ammeter. What is the capacitive reactance of the capacitor? (a) Find the frequency at which a 250-mH inductor has a reactance of 400-Ω. (b) At what frequency would a 0.40μF capacitor have the same reactance? A series RC circuit has a resistance of 200-Ω and a capacitance of 25μF and is driven by a 120-V, 60-Hz source. (a) Find the capacitive reactance and impedance of the circuit. (b) How much current is drawn from the ...A tuning circuit in a radio receiver has a fixed inductance of 0.50 mH and a variable capacitor. (a) If the circuit is tuned to a radio station broadcasting at 980 kHz on the AM dial, what is the capacitance of the ...
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