Exam 33: Alternating-Current Circuits

If an R = 1.0-kΩ resistor, a C = 1.0-μF capacitor, and an L = 0.20-H inductor are connected in series with a V = 150 sin (377t) volts source, what is the maximum current delivered by the source?

The graphs below show the phasors ΔV_max and I_max for five RLC series circuits. The solid arrows represent the voltage phasors, ΔV, and the dashed arrows represent the current phasors, I_max. The graph which represents a circuit where the inductive reactance is greater than the capacitive reactance is

The graphs below show the phasors ΔV_max and I_max for five RLC series circuits. The solid arrows represent the voltage phasors, ΔV, and the dashed arrows represent the current phasors, I_max. The graph which represents a circuit where the capacitive reactance is greater than the inductive reactance is

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

The phase angle between V and I is

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

A high-voltage powerline operates at 500000 V-rms and carries an rms current of 500 A. If the resistance of the cable is 0.050Ω/km, what is the resistive power loss in 200 km of the powerline?

The total impedance Z of an RLC circuit driven by an ac voltage source at angular frequency ω is,

The primary winding of an electric train transformer has 400 turns and the secondary has 50. If the input voltage is 120V(rms) what is the output voltage?

An LC circuit is to have resonant oscillations at 5.0 MHz. Find the value of a capacitor which will work with a 1.0-mH inductor.

An incandescent lightbulb is rated at 100 Watts when plugged into a 110 V-rms household outlet. Calculate the resistance of the filament and the rms current.

An alternating current circuit has resistance R, inductance L and capacitance C in series with a voltage source. Which statement is correct?

An RLC series circuit has R = 100 ohms, C = 25 μF, and L = 0.16 H. For what angular frequency of an ac voltage is the current flow maximum?

A primary current of 6.0 A exists in an ideal iron-core transformer at a primary voltage of 100 volts. If the current in the secondary is 0.75 A, calculate the output voltage.

Determine the rms voltage for the circuit.

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

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 impedance is

The inductance of a tuning circuit of an AM radio is 4.00 mH. Find the capacitance of the circuit required for reception at 1 200 kHz.

The power output, P_out, of an ideal step-up transformer that receives power input, P_in, and which has N₁ turns in the primary and N₂ turns in the secondary coil is given by

An ac power generator produces 50 A (rms) at 3600 V. The voltage is stepped up to 100000 V by an ideal transformer and the energy is transmitted through a long distance power line which has a resistance of 100 ohms. What percentage of the power delivered by the generator is dissipated as heat in the long-distance power line?