Exercise: Alternating Current And Voltage

Questions for: Alternating Current And Voltage

An rms voltage of 5 V is equivalent to ___.
A:
14.14 V peak-to-peak
B:
a peak value of 5 V
C:
10 V peak-to-peak
D:
an average value of 7.07 V
Answer: A
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All periodic frequencies are derived by combining higher frequency ______________ called harmonics.
A:
sine waves
B:
pulse waves
C:
square waves
D:
sawtooth waves
Answer: A
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A peak current of 12.5 mA is equivalent to ___.
A:
an rms value of 25 mA
B:
an average value of 12.5 mA
C:
a peak-to-peak value of 6.25 mA
D:
an average value of 7.96 mA
Answer: D
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If a sine wave's period equals 50 ms, its frequency equals _____.
A:
20 Hz
B:
0.02 Hz
C:
50 Hz
D:
50 kHz
Answer: A
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If a sine wave's frequency equals 25 MHz, its period equals _____.
A:
25 µs
B:
25 ms
C:
4 µs
D:
40 ns
Answer: D
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