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When a two winding transformer is connected as an auto transformer its efficiency at full load

When a two winding transformer is connected as an auto transformer its efficiency at full load Correct Answer Increases

Auto-transformer:

An Auto-transformer is a kind of electrical transformer where primary and secondary shares the same common single winding, i.e. it does not isolate the secondary.

The circuit diagram of an auto transformer is as shown:

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Advantages:

  • Autotransformer is smaller in size and cheaper as compared to ordinary two winding transformer of the same output.
  • An autotransformer has higher efficiency than two winding transformer because of low ohmic loss and core loss due to the reduction of transformer material.
  • An auto-transformer has better voltage regulation as voltage drop in resistance and reactance of the single winding is less.

Related Questions

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