Electrical Machines
If a transformer has turns ratio K, the primary and secondary current are I1 and I2 respectively and magnetizing current and core loss component of no load current Iμ and Iw respectively, then

 I1 = KI2 + Iμ.
 I1 = KI2 + Iw.
 I1 = KI2.
  I1 = KI2 + Iw + Iμ.ok

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Electrical Machines
Where the shunt generators are widely used?

 Where the load is very high.
 Where voltage variation is needed over a wide load range.
  Where a constant voltage is required over a narrow load range.
 Where often load fluctuation is occurred.

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