Exercise: Alternating Current Vs Direct Current

Questions for: Alternating Current Vs Direct Current

What is the waveform period of a square wave signal that horizontally covers 3 major divisions per cycle? (time/cm = 50 ms)
A:
50 ms
B:
100 ms
C:
150 ms
D:
200 ms
Answer: C
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How long would it take to transmit an electromagnetic wave to a receiving antenna 1,000 miles away?
A:
5.38 ms
B:
10.8 ms
C:
53.8 ms
D:
108 ms
Answer: A
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What is the peak-to-peak current value when an ammeter measures a 20 mA value?
A:
14 mA
B:
28 mA
C:
40 mA
D:
57 mA
Answer: D
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What is the rms voltage value of an ac signal whose peak oscilloscope display uses 3 major divisions above the zero setting? (V/cm = 5)
A:
5.3 V
B:
10.6 V
C:
15.0 V
D:
21.2 V
Answer: B
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If the frequency of a radio wave is increased, then its wavelength will:
A:
increase
B:
decrease
C:
remain the same
D:
cannot tell
Answer: B
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