A step down transformer:
Correct answer: C. Increases the output voltage
- A. Increases the output current
- B. Increases the output power
- C. Increases the output voltage
- D. Decreases the output power
Explanation
Actually, a step-down transformer decreases the output current while increasing the output voltage. It works by having more turns in the primary coil than in the secondary coil, which results in a higher voltage and lower current in the secondary coil.
This question appeared on the KMU Centralized Admission Test 2021 paper, which you can sit online with every answer explained.
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About Transformers
Transformers transfer alternating electrical energy between coils by mutual induction, with voltage ratio determined by the turns ratio. The topic covers step-up and step-down transformers, current changes, ideal power conservation and practical losses such as heating and flux leakage. A transformer requires changing magnetic flux, so it does not operate with steady direct current.
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