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.