SSC JE Electrical Engineering 2017 Set 4 Paper

Question : 151 of 200

Marks: +1, -0

Which law states that induced e.m.f and current always opposes producing them ?

Len'z law
Fleming 's law
Faraday's law
Maxwell's law

Solution:

Len’z law- Len’z law states then when an EMF is generated by a change in magnetic flux according to Faraday’s Law, the polarity of the induced emf is such that it produce an current that’s magnetic field opposes the change which produces it.

E=-{dϕ}/{dt}

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