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In order to induce voltage as an output, a changing magnetic field is needed. To create a changing magnetic field in the transformer a changing current and that is an alternating current.

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What is type of current that transformers require to operate?

As a transformer requires an alternating magnetic flux within its core, then the current flowing in its primary winding must be alternating.


A transformer can only the voltage of an alternating current?

A transformer can only increase or decrease the voltage of an alternating current, and it is called step-up transformer or step-down transformer accordingly.


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Fundamental principle of current transducer?

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