Exam 32: Electronics

An ac series circuit consists of a voltage source,an 880-Ω resistor,and an inductance L.(There is no capacitance in the circuit.)The current amplitude is 0.60 A,and the phase angle between the source voltage and the current has a magnitude of 41° (a)Does the source voltage lag or lead the current? (b)What is the voltage amplitude of the source?

A series LRC ac circuit has a peak current of 1.0 A with a frequency of 54 kHz.If the resistance of the circuit is 51 kΩ,the capacitance of the circuit is 19 μF,and the inductance of the circuit is 25 μH,determine the average power of the circuit.

An alternating current is supplied to an electronic component with a warning that the voltage across it should never exceed 12 V.What is the highest rms voltage that can be supplied to this component while staying below the voltage limit in the warning?

The phase angle of an LRC series circuit with a capacitive reactance of 40 Ω,a resistor of 100 Ω and a certain inductor at 1000 Hz is 40.0°.What is the value of the inductance in this circuit?

The phase angle of an LRC series circuit with an inductive reactance of 200 Ω,a resistor of 200 Ω and a certain capacitor at 1000 Hz is 40.0°.What is the value of the capacitance in this circuit?

A 120-V rms voltage at 60.0 Hz is applied across an inductor,a capacitor,and a resistor in series.If the peak current in this circuit is 0.8484 A,what is the impedance of this circuit?

A 120-V rms voltage at 1000 Hz is applied to an inductor,a 2.00-μF capacitor and a 100-Ω resistor,all in series.If the rms value of the current in this circuit is 0.680 A,what is the inductance of the inductor?

An ac circuit is shown in the figure.The rms current in the circuit is 1.3 A.What is the peak magnetic energy in the inductance?

When an LRC series circuit is driven at resonance,which of the following statements about the circuit are correct? (There may be more than one correct choice.)

A series LRC circuit consists of a 12.0-mH inductor,a 15.0-µF capacitor,a resistor,and a 110-V (rms)ac voltage source.If the impedance of this circuit is 45.0 Ω at resonance,what is its impedance at a frequency twice the resonance frequency?

A series LRC circuit consists of an ac voltage source of amplitude 75.0 V and variable frequency,a 12.5-µF capacitor,a 5.00-mH inductor,and a 35.0-Ω resistor. (a)To what angular frequency should the ac source be set so that the current amplitude has its largest value? (b)Under the conditions of part (a),what is the maximum current amplitude? (c)Suppose that the voltage source is set to twice the angular frequency needed in part (a).What will be the current amplitude in this case?

If the voltage amplitude across an 8.50-nF capacitor is equal to 12.0 V when the current amplitude through it is 3.33 mA,the frequency is closest to

(a)In an ac circuit,if the peak value of the voltage is 100 V,what is the rms value of the voltage? A)141 V B)100 V C)210 V D)71 V E)120 V (b)In an ac circuit,if the rms value of the current is 100 mA,what is the peak value of the current? A)141 mA B)100 mA C)210 mA D)71 mA E)120 mA

A series ac circuit consists of a voltage source of frequency 60 Hz and source voltage amplitude 345 volts,a 701-Ω resistor,a 1.6-µF capacitor,and an inductor of inductance L. (a)What must be the value of L for the phase angle to be zero? (b)When L has the value calculated in part (a),what is the current amplitude in the circuit?

What is the average power dissipated by a 25-Ω resistor in an LRC series ac circuit for which the power factor is equal to 0.25 and the maximum voltage of the ac source is 8.0 V?

An LRC series circuit consists of an 85.0-Ω resistor,a 14.0-μF capacitor,a 1.50-mH inductor,and a variable frequency ac source of voltage amplitude 13.25 V.At what angular frequency will the inductive reactance be 4.00 times as large as the capacitive reactance?

An LRC series circuit has R = 15.0 Ω,L = 25.0 mH,and C = 30.0 μF.The circuit is connected to a 120-V (rms)ac source with frequency 200 Hz. (a)What is the impedance of the circuit? (b)What is the rms current in the circuit? (c)What is the rms voltage across the resistor? (d)What is the rms voltage across the inductor? (e)What is the rms voltage across the capacitor?

In a series LRC circuit,the frequency at which the circuit is at resonance is f₀.If you double the resistance,the inductance,the capacitance,and the voltage amplitude of the ac source,what is the new resonance frequency?

A series circuit consists of ac source,a 90-Ω resistor,a 0.80-H inductor,and an 80-μF capacitor.The frequency of the source is adjusted so that the capacitive reactance is equal to twice the inductive reactance.What is the frequency of the source?

When an LRC series circuit is at resonance,which one of the following statements about that circuit is accurate? (There may be more than one correct choice.)