Electrical Machines
Silicon content in steel lamination is kept within 5% as it

All of these
 Increases cost.
 makes the material brittle.
 increases hysteresis loss.

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Electrical Machines
If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then

 Pe will increase but Ph will decrease
 Ph will decrease but Pe will remain same
 Ph will increase but Pe will decrease
 both hysteresis loss(Ph) and eddy current loss(Pe) will increase

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