voltage

Transformer and its structure

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It is a device that converts high voltage AC to low voltage AC of the same frequency and vice versa. It works on the principle of mutual induction, i.e., whenever the current (magnetic flux) through a coil changes, an e.m.f. is induced in the neighbouring coil. According to this principle, when the electric current in … Read more

Differences between alternating and direct current

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S.N Alternating current Direct current 1. The current which changes magnitude and polarity is called alternating current. The current which does not change magnitude and polarity is called direct current. 2. It is produced by AC generator, dynamo, etc. It is produced by cells, battery, DC generator, etc. 3. It can be used in transformer … Read more