Alternating Current and Voltage problems
- 1. 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
Options- A. 16.54 V
- B. 1.65 V
- C. 10.60 V
- D. 5.93 V Discuss
Correct Answer: 16.54 V
- 2. If the rms current through a 6.8 kΩ resistor is 8 mA, the rms voltage drop across the resistor is
Options- A. 5.44 V
- B. 54.4 V
- C. 7.07 V
- D. 8 V Discuss
Correct Answer: 54.4 V
- 3. How many degrees are there in Π/3 rad?
Options- A. 6°
- B. 60°
- C. 180°
- D. 27° Discuss
Correct Answer: 60°
- 4. A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is
Options- A. 4 V
- B. 4.6 V
- C. 1.6 V
- D. 11 V Discuss
Correct Answer: 4 V
- 5. A sawtooth wave has a period of 10 ms. Its frequency is
Options- A. 10 Hz
- B. 50 Hz
- C. 100 Hz
- D. 1,000 Hz Discuss
Correct Answer: 100 Hz
- 6. When a sine wave has a frequency of 100 Hz in 12 s it goes through
Options- A. 1/100 cycle
- B. 12 cycles
- C. 120 cycles
- D. 1,200 cycles Discuss
Correct Answer: 1,200 cycles
- 7. If the rms current through a 4.7 kΩ resistor is 4 mA, the peak voltage drop across the resistor is
Options- A. 4 V
- B. 18.8 V
- C. 26.6 V
- D. 2.66 V Discuss
Correct Answer: 26.6 V
- 8. A 20 kHz pulse waveform consists of pulses that are 15 µs wide. The duty cycle
Options- A. is 1%
- B. is 30%
- C. is 100%
- D. cannot be determined Discuss
Correct Answer: is 30%
- 9. If the rms voltage drop across a 15 kΩ resistor is 16 V, the peak current through the resistor is
Options- A. 15 mA
- B. 1.5 mA
- C. 10 mA
- D. 1 mA Discuss
Correct Answer: 1.5 mA
- 10. A signal with a 400 µs period has a frequency of
Options- A. 250 Hz
- B. 2,500 Hz
- C. 25,000 Hz
- D. 400 Hz Discuss
Correct Answer: 2,500 Hz
More in Electrical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.