Q.1
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
  • 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
0 h : 0 m : 1 s