What is Lenz's law?
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Lenz's law, in electromagnetism, statement that an induced electric current flows in a direction such that the current opposes the change that induced it. This law was deduced in 1834 by the Russian physicist Heinrich Friedrich Emil Lenz (1804–65). Lenz's law. Electromagnetic induction.
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Lenz's law states that the direction of induced current or voltage is such that it opposes the charge or motion (of the conductor) producing it.
For example, If the north pole of a magnet is moved towards a coil, a current is induced in it and it flows in an anticlockwise direction making that end of the coil north pole.
Hence, the two north poles repel, the induced current opposes the motion of the approaching magnet (Lenz law)
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