Sunday, February 17, 2013

Lenz's law

An induced electromotive force (emf) always gives rise to a current whose magnetic field opposes the original change in magnetic flux.

\mathcal{E}=-N\frac{\partial \Phi_\mathrm{B}}{\partial t},

The induced emf (\mathcal{E}) and the change in magnetic flux (\partial\Phi_\mathrm{B} \,) have opposite signs.





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Ref: Wikipedia

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