magnetic flux

Lenz’s Law, Fleming’s Right Hand Rule and Fleming’s Left Hand Rule

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Lenz’s Law Lenz’s law is named after the physicist Emil Lenz who formulated it in 1834. It is a qualitative law that specifies the direction of induced current, but states nothing about its magnitude. Analogous to Newton’s third law in classical mechanics. It gives the direction and sign of induced emf or current. It states … Read more

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