Transformers - working & applications (step up and step down) | A.C. | Physics | Khan Academy
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YouTubeKhan Academy India - English
Transformers - working & applications (step up and step down) | A.C. | Physics | Khan Academy
Transformers step up (increase) or step down (decrease) AC voltage using the principle of electromagnetic induction - mutual induction. A changing current in the primary coil induces an e.m.f in the secondary. Since the e.m.f generated depends on the number of turns, the voltage induced in the secondary can be changed - stepped up or down - by ...
399.4K viewsOct 21, 2020
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