A signal with a 400 s period has a frequency of 400 Hz 2,500 Hz 250 Hz 25,000 Hz TRUE ANSWER : ? YOUR ANSWER : ?
If the rms current through a 6.8 k resistor is 8 mA, the rms voltage drop across the resistor is 8 V 5.44 V 54.4 V 7.07 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 100% is 30% 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 0 V 30 V 35 V 6 V 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 15°. Wave A leads wave B by 105°. Wave A lags wave B by 105°. Wave A lags wave B by 15°. TRUE ANSWER : ? YOUR ANSWER : ?
A sawtooth wave has a period of 10 ms. Its frequency is 50 Hz 100 Hz 10 Hz 1,000 Hz TRUE ANSWER : ? YOUR ANSWER : ?
The average value of a 12 V peak sine wave over one complete cycle is 0 V 1.27 V 6.37 V 7.64 V 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 1.65 V 5.93 V 10.60 V 16.54 V TRUE ANSWER : ? YOUR ANSWER : ?
To produce an 800 Hz sine wave, a four-pole generator must be operated at 200 rps 800 rps 1,600 rps 400 rps TRUE ANSWER : ? YOUR ANSWER : ?