Alternating-Current Circuits and Machines

# College Physics Reasoning and Relationships

Physics & Astronomy

## Quiz 22 :Alternating-Current Circuits and Machines

Showing 1 - 20 of 64
The output voltage of an AC generator is of the form A typical frequency in household circuits is 60 Hz. Using radians for angular measure in this equation, what is the factor in radians per second for this frequency?
Free
Multiple Choice

C

If the rotating coil used in a generator has its radius doubled, what change results in the amplitude of the voltage produced?
Free
Multiple Choice

B

In some countries the AC frequency is 50 Hz. What is the time interval for one cycle at this frequency?
Free
Multiple Choice

B

What is the effective (rms) current value for an AC current with an amplitude of 20 A?
Multiple Choice
In an AC series circuit, the current in a pure resistor differs in phase with the applied voltage by what angle?
Multiple Choice
The rate of heat dissipation in an AC circuit with resistance, R, and effective current, Irms, is given by which of the following?
Multiple Choice
An AC voltage source, with a peak output of 200 V, is connected to a 25- resistor. What is the effective (or rms) current in the circuit?
Multiple Choice
An AC voltage source, with a peak output of 200 V, is connected to a 25- resistor. What is the rate of energy dissipated due to heat in the resistor?
Multiple Choice
The rms current is equal to the direct current that:
Multiple Choice
An AC voltage source, with a peak output of 120 V, results in dissipation of energy in a resistor at rate of 50.0 W. What is the value of the resistance?
Multiple Choice
The peak voltage of an AC source is 400 V. What is the rms voltage?
Multiple Choice
In the typical household AC voltage of 120 V, what is the peak voltage?
Multiple Choice
The frequency in an AC series circuit is halved. By what factor does this change the capacitive reactance?
Multiple Choice
In an AC series circuit the capacitive reactance is 253 and frequency is 100 Hz. What is the capacitance?
Multiple Choice
A 17.0-F capacitor is connected to an AC source with an rms voltage of 120 V and a frequency of 60.0 Hz. What is the rms current in the capacitor?
Multiple Choice
When a 50-F capacitor is attached to an AC source, its capacitive reactance is 60 . If instead a 200-F capacitor is attached to the same source, what will be its capacitive reactance?
Multiple Choice