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OpenStudy (anonymous):
please explain lenzs law
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OpenStudy (prakharluv):
The polarity of induced EMF is such that it tends to produce a current which opposes the change in magnetic flux that produced it.
OpenStudy (prakharluv):
As the north pole of the bar magnet moves towards the coil, the magnetic flux through the coil increases. Hence current is induced in the coil in such a direction that it opposes the increase in flux. This is possible only if the current in the coil is in a counter(anti)-clockwise direction with respect to an observer situated on the side of magnet.
OpenStudy (prakharluv):
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