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Chapter 28: Problem 1
Two AC signals have the same amplitude but different frequencies. Are their rms amplitudes the same?
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The voltage across two components in series is zero. Is it possible that the voltages across the individual components aren't zero? Give an example.
A series \(R L C\) circuit with \(R=47 \Omega, L=250 \mathrm{mH},\) and \(C=4.0 \mu \mathrm{F}\) is connected across a sine-wave generator whose peak output voltage is independent of frequency. Find the frequency range over which the peak current will exceed half its value at resonance.
Find the impedance at \(10 \mathrm{kHz}\) of a circuit consisting of a \(1.5-\mathrm{k} \Omega\) resistor, 5.0 - \(\mu\) F capacitor, and 50 -mH inductor in series.
A 2.2 -nF capacitor and one of unknown capacitance are in parallel across a \(10-\mathrm{V}\) rms sine-wave generator. At \(1.0 \mathrm{kHz}\) the generator supplies a total current of \(3.4 \mathrm{mA}\) rms. The generator frequency is then decreased until the rms current drops to 1.2 mA. Find (a) the unknown capacitance and (b) the lower frequency.
Find the reactance of a 3.3 - \(\mu\) F capacitor at (a) \(60 \mathrm{Hz},\) (b) \(1.0 \mathrm{kHz}\) and (c) \(20 \mathrm{kHz}\)
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