Electronics-Alternating Current vs Direct Current
Electronics-Alternating Current vs Direct Current
11. A test equipment item that has the ability to produce either square, triangular, or sawtooth waveforms is called:
- a function generator
- a radio frequency generator
- an audio frequency generator
- a frequency meter or counter
12. What does the CRT oscilloscope display?
- voltage and period
- current and frequency
- rms voltage and current
- frequency and voltage
13. Power companies supply ac, not dc, because:
- it is easier to transmit ac
- there is no longer a need for dc
- dc is more dangerous
- there are not enough batteries
14. If a waveform period is determined to be 10 microseconds in duration, what is the frequency of the signal?
- 100 Hz
- 1000 Hz
- 10 kHz
- 100 kHz
15. The phase difference between sine waves of different frequencies is:
- equal to their frequency differences
- the difference in their fixed time displacement
- the same throughout time
- constantly changing
16. If a sine wave signal is 100 mV peak-to-peak, how many volts would be measured by a voltmeter?
- 14.14 mV
- 35.4 mV
- 63.7 mV
- 70.7 mV