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State the underlying principle of a tran...

State the underlying principle of a transformer. How is the large-scale transmission of electric energy over long distances done with the use of transformers ?

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A transformer is based on principle of mutual induction which states that due to continuous change in the current in the primary coil, and emf gets induced across the secondary coil. Electric power generated at the the power station is stepped up to very high voltage by means of a step up transformer and transmitted to a distant place at receiving and it is stapped down transformer.
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Knowledge Check

  • Large transformer when used for sometime become very hot and cooled by circulating oil the heating of the transformers is due to

    A
    the heating effect of the current alone
    B
    hysteresis loss alone
    C
    hysteresisi loss effect of the current
    D
    the intense sunligh at noon

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