The rear axle of an automobile is moving southward through a magnetic field dire

Question

The rear axle of an automobile is moving southward through a magnetic field directed vertically downward. There is an emf induced in the rear axle which makes the W end positive There is an emf induced in the rear axle which makes the E end positive There is a current from E to W in the front axle, and W to E in the rear axle There is a current from W to E in the front axle, and E to W in the rear axle There is no emf induced at all The next problem refers to these figures: a metal rod is sliding along a U shaped track. There is a uniform magnetic field which points INTO the page everywhere! (In Fig. I, the rod slides up the page. In Fig. II, the rod slides down the page) In which figure above, if any, is the induced current in the rod towards the Figure I only Figure II only Both figures Neither figure

Explanation / Answer

3. option A 4. In figure I, Due to the movement, the inward flux in increasing , and hence the current produced would try to decrease the flux. But the case in opposite for figure II. option A

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