MAGNETIC FLUX & INDUCED EMF

Establish a relation between change of magnetic flux and induced EMF.

Write True (T) or False (F): Emf can be induced in a closed coil when magnetic flux linkage through it changes.

A copper ring and a wooden ring of same dimension are placed so that there is same magnetic flux through each. Is induced current or induced EMF same in each case when flux · starts varying at the same rate in both.

A : Total induced emf in a loop is not confined to any particular point but it is distributed around the loop in direct proportion to the resistances of its parts. R: In general when there is no change in magnetic flux, no induced emf is produced.

Read the following two statements. (A) Emf can be induced by changing magnetic field. (B) Emf must be induced when a conductor is moved inside magnetic field.

If the instantaneous magnetic flux and induced emf produced in a coil is phi and E respectively, then a according to Faraday's law of electromagetic induction