MAGNETIC FLUX & INDUCED EMF

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.

The magnetic flux linked with the coil (in Weber) is given by theequation phi = 5t^(2) + 3t + 16 The induced EMF in the coil at time, t=4 will be-

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.

Assertion (A): Lenz's law does not violets the principle of conservation of energy. Reason (R): Induce e.m.f. never opposes the change in magnetic flux that causes the e.m.f.

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