The average half-cycle value of a sine wave with aV peak is
25.48 V
6.37 V
14.14 V
50.96 V
Q.2.
A sine wave with an rms value ofV is riding on a dc level ofV. The maximum value of the resulting waveform is
6 V
30 V
35 V
0 V
Q.3.
A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is
4 V
4.6 V
1.6 V
11 V
Q.4.
A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of
0.0045 s
2 ms
1.5 ms
3,000 s
Q.5.
A phasor represents
the magnitude and a quantity direction
the width of a quantity
the phase angle
the magnitude of a quantity
Q.6.
Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?
Wave A leads wave B by 15°.
Wave A lags wave B by 15°.
Wave A leads wave B by 105°.
Wave A lags wave B by 105°.
Q.7.
Two series resistors are connected to an ac source. If there are 7.5 V rms across one resistor and 4.2 V rms across the other, the peak source voltage is
16.54 V
1.65 V
10.60 V
5.93 V
Q.8.
When a sine wave has a frequency ofHz ins it goes through
1/100 cycle
12 cycles
120 cycles
1,200 cycles
Q.9.
A sawtooth wave has a period ofms. Its frequency is
10 Hz
50 Hz
100 Hz
1,000 Hz
Q.10.
The average value of aV peak sine wave over one complete cycle is
0 V
1.27 V
7.64 V
6.37 V
Q.11.
A sine wave ofkHz is changing at a faster rate than a sine wave with a frequency of
25 kHz
12 kHz
18 kHz
1.3 MHz
Q.12.
A sinusoidal current has an rms value ofmA. The peak-to-peak value is
45.12 mA
16 mA
39.6 mA
22.6 mA
Q.13.
If the peak of a sine wave isV, the peak-to-peak value is
6.5 V
13 V
26 V
none of the above
Q.14.
A pulse waveform has a high time of 8 ms and a pulse width ofms. The duty cycle is
25%
50%
1%
100%
Q.15.
One sine wave has a positive-going zero crossing atand another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is
0°
45°
40°
none of the above
Q.16.
To produce anHz sine wave, a four-pole generator must be operated at
200 rps
400 rps
800 rps
1,600 rps
Q.17.
The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate ofrps. The frequency of the induced output voltage is
40 Hz
100 Hz
400 Hz
indeterminable
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