Discussion
Home ‣ Electronics ‣ Alternating Current vs Direct Current Comments
- Question
A sine wave reaches maximum positive voltage at:
Options- A. 90°
- B. 0°
- C. ?90°
- D. 360°
- Correct Answer
- 90°
- 1. What is the waveform period of a square wave signal that horizontally covers 3 major divisions per cycle? (time/cm = 50 ms)
Options- A. 50 ms
- B. 100 ms
- C. 150 ms
- D. 200 ms Discuss
- 2. Which percentages of full-amplitude rise time are used for a pulse wave?
Options- A. 0 to 50 percent
- B. 0 to 100 percent
- C. 5 to 95 percent
- D. 10 to 90 percent Discuss
- 3. What does the CRT oscilloscope display?
Options- A. voltage and period
- B. current and frequency
- C. rms voltage and current
- D. frequency and voltage Discuss
- 4. The power that is distributed from a power plant to your home is:
Options- A. high voltage to high voltage
- B. low voltage to high voltage
- C. high voltage to low voltage
- D. low voltage to low voltage Discuss
- 5. What voltage will an ac voltmeter display?
Options- A. rms
- B. average
- C. peak
- D. peak-to-peak Discuss
- 6. How long would it take to transmit an electromagnetic wave to a receiving antenna 1,000 miles away?
Options- A. 5.38 ms
- B. 10.8 ms
- C. 53.8 ms
- D. 108 ms Discuss
- 7. What is the period of a 16 MHz sine wave?
Options- A. 196 ns
- B. 62.5 ns
- C. 31.25 ns
- D. 19.9 ns Discuss
- 8. What is the peak-to peak voltage of a 56 Vrms ac voltage?
Options- A. 158 V
- B. 164 V
- C. 82 V
- D. 79 V Discuss
- 9. To operate properly, a transistor's base-emitter junction must be forward biased with reverse bias applied to which junction?
Options- A. collector-emitter
- B. base-collector
- C. base-emitter
- D. collector-base Discuss
- 10. Voltage-divider bias provides:
Options- A. an unstable Q point
- B. a stable Q point
- C. a Q point that easily varies with changes in the transistor's current gain
- D. a Q point that is stable and easily varies with changes in the transistor's current gain Discuss
Alternating Current vs Direct Current problems
Search Results
Correct Answer: 150 ms
Correct Answer: 10 to 90 percent
Correct Answer: voltage and period
Correct Answer: high voltage to low voltage
Correct Answer: rms
Correct Answer: 5.38 ms
Correct Answer: 62.5 ns
Correct Answer: 158 V
Correct Answer: collector-base
Correct Answer: a stable Q point
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