Lanz law and conservation of energy
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Posted by Satyam Baghel 6 years, 3 months ago
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Sia ? 6 years, 3 months ago
Lenz's law states that the direction of induced emf is such, that it produces a current which opposes the change in magnetic flux that produced it.
Mathematically,
e = -N{tex}\frac{d\varphi}{dt}{/tex}
Suppose a magnet is moved towards a closed coil. The direction of induced emf in it by Lenz’s law opposes its inward motion. As a result, the magnet will be moved towards the coil against this opposing force. In such a case work will have to be done. This work is converted into electrical energy in the form of induced emf. Thus, Lenz’s law is in accordance with the law of conservation of energy.
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