A phasor represents the magnitude of a quantity the magnitude and a quantity direction the width of a quantity the phase angle TRUE ANSWER : ? YOUR ANSWER : ?
A square wave has a period of 60 s. The first odd harmonic is 5 kHz 33.33 kHz 50 kHz 500 kHz TRUE ANSWER : ? YOUR ANSWER : ?
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 40° 45° None of these 0° TRUE ANSWER : ? YOUR ANSWER : ?
When a sine wave has a frequency of 100 Hz in 12 s it goes through 12 cycles 1/100 cycle 1,200 cycles 120 cycles TRUE ANSWER : ? YOUR ANSWER : ?
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 400 Hz 40 Hz indeterminable 100 Hz TRUE ANSWER : ? YOUR ANSWER : ?
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 5.93 V 10.60 V TRUE ANSWER : ? YOUR ANSWER : ?
A sawtooth wave has a period of 10 ms. Its frequency is 1,000 Hz 50 Hz 10 Hz 100 Hz TRUE ANSWER : ? YOUR ANSWER : ?
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 lags wave B by 15°. Wave A lags wave B by 105°. Wave A leads wave B by 105°. Wave A leads wave B by 15°. TRUE ANSWER : ? YOUR ANSWER : ?
If a sine wave goes through 10 cycles in 20 s, the period is 100 s 4 s 20 s 2 s TRUE ANSWER : ? YOUR ANSWER : ?
A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle is 1% cannot be determined is 100% is 30% TRUE ANSWER : ? YOUR ANSWER : ?