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- Question
A step-up transformer steps up power.
Options- A. True
- B. False
- Correct Answer
- False
- 1. A transformer changes ac to dc.
Options- A. True
- B. False Discuss
- 2. A transformer responds only to dc.
Options- A. True
- B. False Discuss
- 3. A reflective load is a load as it appears to the source in the primary of a transformer.
Options- A. True
- B. False Discuss
- 4. An autotransformer is one in which the primary and secondary are automatically coupled.
Options- A. True
- B. False Discuss
- 5. A transformer consists of two or more cores that are electrically coupled on a common core.
Options- A. True
- B. False Discuss
- 6. 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
- 7. A center tap (CT) is a connection at the midpoint of the secondary winding of a transformer.
Options- A. True
- B. False Discuss
- 8. If the voltage is stepped up, the current is stepped down, and vice versa.
Options- A. True
- B. False Discuss
- 9. A step-down transformer has a turns ratio less than 1.
Options- A. True
- B. False Discuss
- 10. The phase angle (?) of a series RL circuit varies directly with frequency.
Options- A. True
- B. False Discuss
Transformers problems
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Correct Answer: False
Correct Answer: False
Correct Answer: True
Correct Answer: False
Correct Answer: False
Correct Answer: True
Correct Answer: True
Correct Answer: True
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
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