A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is 22.6 mA 16 mA 45.12 mA 39.6 mA TRUE ANSWER : ? YOUR ANSWER : ?
A signal with a 400 s period has a frequency of 400 Hz 2,500 Hz 25,000 Hz 250 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 leads wave B by 105°. Wave A lags wave B by 105°. Wave A lags wave B by 15°. Wave A leads wave B by 15°. TRUE ANSWER : ? YOUR ANSWER : ?
When a sine wave has a frequency of 100 Hz in 12 s it goes through 1/100 cycle 120 cycles 12 cycles 1,200 cycles 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 45° None of these 0° 40° TRUE ANSWER : ? YOUR ANSWER : ?
The average value of a 12 V peak sine wave over one complete cycle is 7.64 V 0 V 1.27 V 6.37 V TRUE ANSWER : ? YOUR ANSWER : ?
A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle cannot be determined is 30% is 100% is 1% TRUE ANSWER : ? YOUR ANSWER : ?
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 35 V 0 V 6 V 30 V TRUE ANSWER : ? YOUR ANSWER : ?
A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of 1.5 ms 0.0045 s 2 ms 3,000 s TRUE ANSWER : ? YOUR ANSWER : ?