Exam 23: Alternating Current Circuits

Two 0.20-H inductors and one 0.44-H inductor are connected in series across the terminals of a 60.0-Hz ac generator.What is the total inductive reactance of this circuit?

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- $\Omega$ resistor. -Determine the rms voltage of the generator.

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -What is the inductive reactance?

The following table gives the reactance and rms voltage across the elements of a series RCL circuit: -What is the rms current in the circuit?

What is the power factor for this circuit?

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -What is the capacitive reactance?

The voltage across and the current through a single circuit element connected to an ac generator are shown in the graph. -Which one of the following statements concerning an ac circuit is true?

A battery is used to drive a circuit.After a certain amount of time, the current is zero amperes.When the same circuit is driven by an ac generator, the current is non-zero and alternates.Which combination of elements is most likely to comprise the circuit?

Three 4.0-µF capacitors are connected in parallel across the terminals of a 60.0-Hz generator.What is the capacitive reactance of the circuit?

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -A series RCL circuit contains a 222- $\Omega$ resistor, a 1.40-µF capacitor, and a 0.125-H inductor.The 360-Hz ac generator in the circuit has an rms voltage of 208 V.What is the average electric power dissipated by the circuit?

The voltage across and the current through a single circuit element connected to an ac generator are shown in the graph. -Determine the rms current through this circuit element.

Which one of the following statements concerning diodes is false?

An oscillating LC circuit has a resonant frequency of 1.2 × 10⁶ Hz.The diagram shows the system at t = 0 s when there is no charge on the capacitor and the current is in the direction shown.At this time, the energy stored in the inductor is 2.5 × 10^-7 J. -Determine the value of the current at the instant shown in the drawing.

The voltage across and the current through a single circuit element connected to an ac generator are shown in the graph. -Which one of the following statements concerning this circuit element is true?

An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz.It is connected in series with a 50.0- $\Omega$ resistor and a 0.500-H inductor. -What is the rms current through the resistor?

An ac generator supplies an rms (not peak) voltage of 180 V at 60.0 Hz.The generator is connected in series with a 0.50-H inductor, a 6.0-µF capacitor and a 300- $\Omega$ resistor. -Determine the peak voltage of the generator.

The following table gives the reactance and rms voltage across the elements of a series RCL circuit: -What is the impedance of the circuit?

An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz.The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85- $\Omega$ resistor. -What is the inductive reactance for this circuit?

The graph shows the impedance as a function of frequency for a series RCL circuit.At what frequency will this circuit resonate?

The current in a certain ac circuit is independent of the frequency at a given voltage.Which combination of elements is most likely to comprise the circuit?