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This is an MCQ-based quiz on the topic of Introduction to the alternating current quiz.
This set of MCQs helps you brush up on the important physics topics and prepare you to dive into skill practice and expand your knowledge.
The sixth harmonic of an ac wave whose period is 1.000 millisecond (1.000 ms) has a
frequency of _____ Hz
0.006
167
7
6
In a 117-V rms utility circuit, the peak-to-peak voltage is approximately
82.7
165
234
331
In a 117-V rms utility circuit, the positive peak voltage is approximately
82/.7
165
234
331
Suppose that two ac waves have the same frequency but differ in phase by exactly
1⁄20 of a cycle. What is the phase difference between these two waves?
18
20
36
5.73
Which of the following can vary with ac, but never with dc?
Power
Voltage
Frequency
Amplitude
When frequency decreases, capacitive reactance _____.
Increases
Decreases
Remains the same
May increase or decrease
The power factor is the ratio of __________________ power to _________________ power.
True and apparent
True and real
Positive and negative
Factor and real
In a circuit containing resistance only, the voltage and current are ____________________ with one
another.
Together
Range
In phase
Full rotation
The electricity in our house is
AC
DC
BC
AD
Battery is
AC source
DC source
None of the above
All of the above
