What is transformer? On what principal it works?
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★Transformer is an electrical device that trades voltage for current in a circuit, while not affecting the total electrical power. ... Transformers can be used either to increase the voltage also known as stepping up the voltage, or they can decrease the voltage also known as stepping down the voltage.
★Transformer is an electrical apparatus designed to convert alternating current from one voltage to another. It can be designed to "step up" or "step down" voltages and works on the magnetic induction principle. ... A voltage is then induced in the other coil, called the secondary or output coil.
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