Step-up transformer , the secondary potential difference is larger than primary potential difference , Mutual inductance , an EMF in and current are produced in one coil due to changing current in the other coil , Transformer , is a device that increases or decreases potential difference with relatively little waste of energy , Ideal transformer , The power delivered to the secondary circuit equals the power supplied to primary circuit  (100% efficient), Real transformer , The efficiency is 95%- 98% .

Transformers

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