Exercise: Alternating Current Vs Direct Current

Questions for: Alternating Current Vs Direct Current

DC current flows in one direction, while ac current rises from zero to a maximum, then falls to zero in one direction, then rises to a maximum, then falls to zero in the opposite direction.
A:
True
B:
False
C:
D:
Answer: A
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What is the period of a 16 MHz sine wave?
A:
196 ns
B:
62.5 ns
C:
31.25 ns
D:
19.9 ns
Answer: B
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One oscilloscope selector knob that allows the major and minor divisions of the graticule to be used to determine a waveform period is called a:
A:
focus control
B:
time/cm control
C:
intensity control
D:
volts/cm control
Answer: B
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What is the peak-to peak voltage of a 56 Vrms ac voltage?
A:
158 V
B:
164 V
C:
82 V
D:
79 V
Answer: A
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A sine wave has:
A:
four quadrants
B:
two alternations
C:
one period
D:
all of the above
Answer: D
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