Question
Download Solution PDFThe amount of EMF induced in a coil cutting the magnetic lines of force is determined by the following given factors Select the odd one.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Faraday's law of electromagnetic induction:
Statement 1: There should be change in the flux linkage with the coil in order to induce emf in it.
Statement 2: The magnitude of this induced emf is proportional to rate of change of flux linkage.
Mathematically, Faraday's law is given by
\(e=\frac{-d\Psi}{dt}\)
where Ψ = Nϕ ⇒ flux linkages (weber-terms)
Explanation:
Consider a coil rotating in a magnetic field gives in the fig.
EMF induced in the coil.
E = V.B.l sinθ
where V = Velocity at which the coil rotates inside the mag. field
B = Strength of the magnetic field
l = Length of the coil or conductor passing through the magnetic field.
Hence, maxm emf will be at = 0 90°
EMF induced in the coil does not depend on the temperature of magnetic field.
Therefore, correct option is (3).
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