Chapter 32: Q. 8 (page 905)
The resonance frequency of a series RLC circuit is less than the EMF frequency. Does the current lead or lag the EMF? Explain.
The current lags behind the EMF.
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A 200 โฆ resistor is connected to an AC source with =10 V. What is the peak current through the resistor if the emf frequency is (a) 100 Hz? (b) 100 kHz?
FIGURE shows emf phasors a, b, and c.
a. For each, what is the instantaneous value of the emf?
b. At this instant, is the magnitude of each emf increasing, decreasing, or holding constant?
The emf phasor in FIGURE EX32.2 is shown at .
a. What is the angular frequency ? Assume this is the first rotation.
b. What is the instantaneous value of the emf?
a. For an RC circuit, find an expression for the angular frequency at which .
b. What is VR at this frequency ?
The current in a series RLC circuit lags the EMF by . You cannot change the EMF. What two different things could you do to the circuit that would increase the power delivered to the circuit by the EMF?
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