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www.GOALias.blogspot.comElectromagneticInductioneven if the charges are stationary [and the q (v × B) term of the Lorentzforce is not operative], an emf is nevertheless induced in the presence of atime-varying magnetic field. Thus, moving charges in static field and staticcharges in a time-varying field seem to be symmetric situation forFaraday’s law. This gives a tantalising hint on the relevance of the principleof relativity for Faraday’s law.4. The motion of a copper plate is damped when it is allowed to oscillatebetween the magnetic pole-pieces. How is the damping force, produced bythe eddy currents?EXERCISES6.1 Predict the direction of induced current in the situations describedby the following Figs. 6.18(a) to (f ).FIGURE 6.18229