Discussion
Home ‣ Electrical Engineering ‣ Transformers See What Others Are Saying!
- Question
The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 Ω load. The turns ratio is 3:1. What is the secondary voltage?
Options- A. 2 V
- B. 20 V
- C. 180 V
- D. 18 V
- Correct Answer
- 20 V
- 1. The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is
Options- A. 1,000 V
- B. 2,000 V
- C. 31.25 V
- D. 3,125 V Discuss
- 2. A 10 Ω resistor, a 90 mH coil, and a 0.015 µF capacitor are in series across an ac source. The impedance magnitude at 1,200 Hz below fr is
Options- A. 1,616 Ω
- B. 161 Ω
- C. 3,387 Ω
- D. 1,771 Ω Discuss
- 3. Approximately how much current flows through a 3.3 MΩ resistor across a 30 V source?
Options- A. 9 µA
- B. 90 µA
- C. 900 µA
- D. 9000 µA Discuss
- 4. In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?
Options- A. 0 W
- B. 14.1 W
- C. 111.5 W
- D. 1,020 W Discuss
- 5. A balanced load is one in which all the impedances are equal.
Options- A. True
- B. False Discuss
- 6. A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor are all in parallel. The total resistance is approximately
Options- A. 790 Ω
- B. 470 Ω
- C. 60 Ω
- D. 30 Ω Discuss
- 7. What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV?
Options- A. 4 kVA
- B. 0.25 kVA
- C. 16 kVA
- D. 8 kVA Discuss
- 8. In a series RLC circuit, the current is minimum at resonance.
Options- A. True
- B. False Discuss
- 9. In a series circuit, the individual powers are additive.
Options- A. True
- B. False Discuss
- 10. If the voltage is stepped up, the current is stepped down, and vice versa.
Options- A. True
- B. False Discuss
More questions
Correct Answer: 2,000 V
Correct Answer: 1,616 Ω
Correct Answer: 9 µA
Correct Answer: 111.5 W
Correct Answer: True
Correct Answer: 60 Ω
Explanation:
1/R = (1/470 + 1/220 + 1/100)
R = 59.98 ohm
R = 59.98 ohm
Correct Answer: 16 kVA
Correct Answer: False
Correct Answer: True
Correct Answer: True
Comments
There are no comments.More in Electrical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.