To produce an 800 Hz sine wave, a four-pole generator must be operated at
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Electrical Engineering · all questionsAlternating Current And Voltage
Alternating Current And Voltage
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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?
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A ramp is the type of waveform characterized by a non-linear increase or decrease in voltage or current.
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Amplitude is the maximum value of a voltage or current.
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The average half-cycle value of a sine wave with a 40 V peak is
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A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of
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When a sine wave has a frequency of 100 Hz in 12 s it goes through
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If a sine wave goes through 10 cycles in 20 µs, the period is
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A phasor represents
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A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is
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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
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A 1 kHz signal has a period of 1 ms.
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A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of
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The instantaneous value is the voltage or current value of a waveform at its peak.
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A signal with a 400 µs period has a frequency of
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A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is
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If the peak of a sine wave is 13 V, the peak-to-peak value is
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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
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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
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Average value of a sine wave is 0.707 times the peak value.
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