RMS values, LCR circuits, resonance, power factor and transformers.
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Q1 · Alternating Current · MEDIUM
An AC voltage V = 200√2 sin(100πt) volts is applied across a pure inductor of inductance 0.5 H. What is the peak current through the inductor?
Q2 · Alternating Current · HARD
An ac voltage V = V₀ sin(ωt) is applied across a series LCR circuit. At resonance, if the voltage across the inductor is 200 V and the voltage across the capacitor is 200 V, what is the voltage across the resistor if the applied voltage is 100 V?
Q3 · Alternating Current · MEDIUM
In a series LCR circuit connected to an AC source of angular frequency ω, the circuit is in resonance. If the angular frequency is increased slightly, which of the following statements is correct?
Q4 · Alternating Current · HARD
An AC source of peak voltage 220 V and frequency 50 Hz is connected to a series LCR circuit with L = 0.5 H, C = 10 μF, and R = 100 Ω. What is the impedance (in Ω) of the circuit?