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- Question
If the voltage is stepped up, the current is stepped down, and vice versa.
Options- A. True
- B. False
- Correct Answer
- True
- 1. A center tap (CT) is a connection at the midpoint of the secondary winding of a transformer.
Options- A. True
- B. False Discuss
- 2. The primary is the winding connected to the source, and the secondary is the winding connected to the load.
Options- A. True
- B. False Discuss
- 3. A step-up transformer steps up power.
Options- A. True
- B. False Discuss
- 4. A transformer changes ac to dc.
Options- A. True
- B. False Discuss
- 5. A transformer responds only to dc.
Options- A. True
- B. False Discuss
- 6. A step-down transformer has a turns ratio less than 1.
Options- A. True
- B. False Discuss
- 7. The phase angle (?) of a series RL circuit varies directly with frequency.
Options- A. True
- B. False Discuss
- 8. A power factor of 1 indicates a purely reactive circuit, and a power factor of 0 indicates a purely resistive circuit.
Options- A. True
- B. False Discuss
- 9. Total current in an RL circuit always lags the source voltage.
Options- A. True
- B. False Discuss
- 10. In a lag network, the output voltage lags the input voltage in phase.
Options- A. True
- B. False Discuss
Transformers problems
Search Results
Correct Answer: True
Correct Answer: True
Correct Answer: False
Correct Answer: False
Correct Answer: False
Correct Answer: True
Explanation:
Ns/Np is known as the turns ratio.
In step down transformer the number of turns in secondary winding (Ns) will be less than the number of turns in primary (Np).
Therefore, the ratio will be less than 1 for step down transformer.
Ex: Np = 10, Ns = 5; Turns ratio = 5/10 = 0.5.
In step down transformer the number of turns in secondary winding (Ns) will be less than the number of turns in primary (Np).
Therefore, the ratio will be less than 1 for step down transformer.
Ex: Np = 10, Ns = 5; Turns ratio = 5/10 = 0.5.
Correct Answer: True
Correct Answer: False
Correct Answer: True
Correct Answer: True
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