Consider the following diagram of a working transformer.Which statement is CORRECT about the transformer?I. Input voltage is equal to output voltage.II. Input voltage is less than output voltage.III. Input voltage is greater than output voltage.
Correct answer: A. II only
- A. II only
- B. III only
- C. I and II
- D. I and III
Explanation
The correct answer is Option A: II only. In a transformer, the output voltage is typically greater than the input voltage due to the principles of electromagnetic induction. Option B, C, and D are incorrect as the output voltage is not equal to or less than the input voltage in a transformer.
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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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