Question

Describe the direction of an induced e.m.f in a circuit ? how does this phenomenon relate to conservation of energy?

Answer 1

Answer:

Lenz's law states that the direction of an e.m.f induced by changing magnetic field (see Faraday's Law) will be such that if it were to cause a current to flow in a conductor in an external circuit, then that current would generate a field that would oppose the change that created it.

Lenz's Law combined with Faraday's Law gives:

start text, induced, space, e, point, m, point, f, point, end text, equals, minus, N, start fraction, delta, \phi, divided by, delta, t, end fraction.  

induced e.m.f.=−N  

Δt

Δϕ