Discussion
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- Question
Two 10 H inductors are in parallel and the parallel combination is in series with a third 10 H inductor. What is the approximate total reactance when a voltage with a frequency of 7 kHz is applied across the circuit terminals?
Options- A. 219 kΩ
- B. 66 kΩ
- C. 660 kΩ
- D. 1.3 MΩ
- Correct Answer
- 660 kΩ
- 1. If the peak of a sine wave is 13 V, the peak-to-peak value is
Options- A. 6.5 V
- B. 13 V
- C. 26 V
- D. none of the above Discuss
- 2. A galvanometer is a meter that measures small amounts of voltage.
Options- A. True
- B. False Discuss
- 3. An imaginary number is one that exists only in the mind of the mathematician.
Options- A. True
- B. False Discuss
- 4. The voltage at one point in a circuit is always measured relative to another point.
Options- A. True
- B. False Discuss
- 5. If you used 600 W of power for 60 h, you have used
Options- A. 36 kWh
- B. 3.6 kWh
- C. 10 kWh
- D. 1 kWh Discuss
- 6. In a certain Y-Y system, the source phase currents each have a magnitude of 9 A. The magnitude of each load current for a balanced load condition is
Options- A. 3 A
- B. 6 A
- C. 9 A
- D. 27 A Discuss
- 7. In 0.025 W, there are
Options- A. 25 kW
- B. 0.00025 mW
- C. 2,500 µW
- D. 25 mW Discuss
- 8. Compare the total copper cross sections in terms of current-carrying capacity for a single-phase and a three-phase 120 V system with effective load resistance of 15 Ω.
Options- A. single-phase 32 A; three-phase 16 A
- B. single-phase 16 A; three-phase 8 A
- C. single-phase 8 A; three-phase 4 A
- D. single-phase 16 A; three-phase 0 A Discuss
- 9. The following resistors are in parallel across a voltage source: 220 Ω, 470 Ω, and 560 Ω. The resistor with the least current is
Options- A. 220 Ω
- B. 470 Ω
- C. 560 Ω
- D. impossible to determine without knowing the voltage Discuss
- 10. A neutral atom with an atomic number of five has how many electrons?
Options- A. 1
- B. 5
- C. none
- D. depends on the type of atom Discuss
More questions
Correct Answer: 26 V
Correct Answer: False
Correct Answer: False
Correct Answer: True
Correct Answer: 36 kWh
Correct Answer: 9 A
Correct Answer: 25 mW
Correct Answer: single-phase 16 A; three-phase 8 A
Correct Answer: 560 Ω
Correct Answer: 5
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