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what do not change in transformer?

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1 Answer

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Frequency and power are constant in transformers. Suppose we apply 50 Hz input frequency then the output frequency will also be 50 Hz whether the transformer is step up or step down. Similar with power, power is the multiplication of voltage and current. In transformers, if the voltage is increase on secondary side the current is decreased on secondary side and hence power on primary side and secondary side remains constant.

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