Exam 33: Alternating-Current Circuits

All three circuits shown below have R = 100 Ω, L = 0.1 H and emf ε = (5.0 V) sin (377 t). Which statement regarding the angular resonance frequencies ω_A, ω_B and ω_C is correct?

Suppose the circuit parameters in a series RLC circuit are: L = 1.00 μH, C = 10.0 nF, R = 100 Ω, and the source voltage is 220 V. Determine the resonant frequency of the circuit and the amplitude of the current at resonance.

A 10.0-μF capacitor is plugged into a 110 V-rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the capacitor?

The voltage 8.00 sin (400t) is applied to a series RLC circuit, with R = 200 Ω, L = 0.100 H, and C = 1.00 μF. What are the impedance Z and the phase angle θ?

A current I = 3 sin (400 t) amperes flows in a series RL circuit in which L = 1 mH and R = 100Ω. What is the average power loss?

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RC circuit with R = 10.0 Ω and C = 300 μF. The power factor, cos φ, is

What is the average power dissipation in a series RC circuit if R = 5.00 kΩ, C = 2.00 μF, and V = 170 cos (300t)?

The graphs below represent current and voltage phasors at one instant of time. The solid arrows represent the voltage phasors, ΔV_max, and the dashed arrows represent the current phasors, I_max. The graph which shows the correct relationship between current and voltage phasors for a capacitor in an RC circuit is

A 2.0-μF capacitor in series with a 2.0-kΩ resistor is connected to a 60-Hz ac source. Calculate the impedance of the circuit.

Determine the rms voltage drop across the inductor in the circuit.

An ideal step-down transformer has 200 primary turns and 50 secondary turns. If 440 volts (rms) is placed across the primary, what is the current in the secondary when the load resistance is 7.00 ohms?

In a parallel RLC circuit, where I_R = IR_{, max} sin(ωt), the current through the inductor, I_L, is

Inductive reactance X_L is given by

Determine the resonant frequency of the circuit.

An ac generator with peak voltage 100 volts is placed across a 10-Ω resistor. What is the average power dissipated?

A 10.0-Ω resistor, 10.0-mH inductor, and 10.0-μF capacitor are connected in series with a 10.0-kHz voltage source. The rms current through the circuit is 0.200 A. Find the rms voltage drop across each of the 3 elements.

A transformer is to be designed to increase the 30 kV-rms output of a generator to the transmission-line voltage of 345 kV-rms. If the primary winding has 80 turns, how many turns must the secondary have?

A 0.500-H inductor is connected into a 110 V-rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the inductor?

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RL circuit with R = 10.0 Ω and L = 10.0 mH. The power factor, cos φ, is

A 60.0-Hz ac generator with a peak voltage of 110 V drives a series RL circuit with R = 10.0 Ω and L = 10.0 mH. The peak current in the circuit is