Q.1
A signal with a 400 µs period has a frequency of
Q.2
A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is
Q.3

The length of a phasor represents the amplitude.

  • True
  • False
Q.4

Amplitude is the maximum value of a voltage or current.

  • True
  • False
Q.5

The duty cycle of a pulse waveform with a pulse width ofµs and a period ofµs is 25%.

  • True
  • False
Q.6

A ramp is the type of waveform characterized by a non-linear increase or decrease in voltage or current.

  • True
  • False
Q.7

A 1 kHz signal has a period of 1 ms.

  • True
  • False
Q.8

The angular position of a phasor represents the angle of the sine wave with respect to a reference.

  • True
  • False
Q.9

The instantaneous value is the voltage or current value of a waveform at its peak.

  • True
  • False
Q.10

The designation rms means repetitions measured per second.

  • True
  • False
Q.11

Duty cycle is the characteristic of a pulse waveform that indicates the high time versus the low time.

  • True
  • False
Q.12

The unit of frequency is the hertz.

  • True
  • False
Q.13

Periodic is characterized by a repetition at fixed time intervals.

  • True
  • False
Q.14

Average value of a sine wave is 0.times the peak value.

  • True
  • False
Q.15

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.16

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.17

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.18

A pulse waveform has a high time of 8 ms and a pulse width ofms. The duty cycle is

  • 25%
  • 50%
  • 1%
  • 100%
Q.19

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.20

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.21

A pulse waveform has a high time of 8 ms and a pulse width ofms. The duty cycle is

  • 25%
  • 50%
  • 1%
  • 100%
Q.22

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
Q.23

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
Q.24

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.25

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.26

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.27

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.28

When a sine wave has a frequency ofHz ins it goes through

  • 1/100 cycle
  • 12 cycles
  • 120 cycles
  • 1,200 cycles
Q.29

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.30

A phasor represents

  • the magnitude and a quantity direction
  • the width of a quantity
  • the phase angle
  • the magnitude of a quantity
0 h : 0 m : 1 s