Q.1
Duty cycle is the characteristic of a pulse waveform that indicates the high time versus the low time.
Q.2
A 20 kHz pulse waveform consists of pulses that are 15 µs wide. The duty cycle
Q.3
If the rms current through a 6.8 kΩ resistor is 8 mA, the rms voltage drop across the resistor is
Q.4
The duty cycle of a pulse waveform with a pulse width of 10 µs and a period of 100 µs is 25%.
Q.5
A square wave has a period of 60 µs. The first odd harmonic is
Q.6
Periodic is characterized by a repetition at fixed time intervals.
Q.7
If the rms current through a 4.7 kΩ resistor is 4 mA, the peak voltage drop across the resistor is
Q.8
A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is
Q.9
The length of a phasor represents the amplitude.
Q.10
If the rms voltage drop across a 15 kΩ resistor is 16 V, the peak current through the resistor is
Q.11
The angular position of a phasor represents the angle of the sine wave with respect to a reference.
Q.12
The unit of frequency is the hertz.
Q.13
The designation rms means repetitions measured per second.
Q.14
A saw-tooth wave has a period of 10 ms. Its frequency is
Q.15
One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is
Q.16
How many degrees are there in p/3 rad?
Q.17
The average value of a 12 V peak sine wave over one complete cycle is
Q.18
A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is
Q.19
If the peak of a sine wave is 13 V, the peak-to-peak value is
Q.20
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
Q.21
A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of
Q.22
When a sine wave has a frequency of 100 Hz in 12 s it goes through
Q.23
The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is
Q.24
A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is
Q.25
A 1 kHz signal has a period of 1 ms.
Q.26
A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of
Q.27
The instantaneous value is the voltage or current value of a waveform at its peak.
Q.28
If a sine wave goes through 10 cycles in 20 µs, the period is
Q.29
A phasor represents
Q.30
Average value of a sine wave is 0.707 times the peak value.
0 h : 0 m : 1 s