Alternating Current and Voltage problems
- 1. 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
Options- A. 0°
- B. 45°
- C. 40°
- D. none of the above Discuss
Correct Answer: 40°
- 2. A square wave has a period of 60 µs. The first odd harmonic is
Options- A. 5 kHz
- B. 50 kHz
- C. 500 kHz
- D. 33.33 kHz Discuss
Correct Answer: 50 kHz
- 3. 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
Options- A. 40 Hz
- B. 100 Hz
- C. 400 Hz
- D. indeterminable Discuss
Correct Answer: 400 Hz
- 4. A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of
Options- A. 25 kHz
- B. 12 kHz
- C. 18 kHz
- D. 1.3 MHz Discuss
Correct Answer: 12 kHz
- 5. A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of
Options- A. 0.0045 s
- B. 2 ms
- C. 1.5 ms
- D. 3,000 µs Discuss
Correct Answer: 0.0045 s
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