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Question

A transformer is employed to


A

obtain a suitable dc voltage

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B

convert dc into ac

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C

obtain a suitable ac voltage

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D

convert ac into dc

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Solution

The correct option is C

obtain a suitable ac voltage


  1. Transfer is a device used to increase or decrease the voltage or current in a circuit.
  2. There are two types of transformers - step up and step down.
  3. Transformer changes voltage or current level without modifying the frequency.
  4. The transformer works on the principle of Faraday's law of induction, so ac voltage or current is used in it.
  5. It means that the transformer does not work with dc voltage.
  6. So, the transformer is used to obtain suitable ac voltage.

Hence, option (c) is correct.


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