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A copper wire bent in the shape of a semicircle of radius r translates in its plane with a constant velocity v. A uniform magnetic field B exists in the direction perpendicular to the plane of the wire. Find the emf induced between the ends of the wire if (a) the velocity is perpendicular ot the diameter joining free ends, (b) the velocity is parallel to this diameter.

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(a) Components of length moving perpendicular to V is 2R`
`:. E=Bv 2R`
`(b) Component of length perpendicular to velocity=0`
`E=0.`
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HC VERMA-ELECTROMAGNETIC INDUCTION-EXERCISE
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  2. A right angled triangle abc, made from a metallic wire, moves at a uni...

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  3. A copper wire bent in the shape of a semicircle of radius r translates...

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  4. A wire of length 10cm translates in a direction making an angle of 60^...

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  5. A circular copper ring of radius r translates in its plane with a cons...

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  6. Shows a wire sliding on two parallel, conducting rails placed at a se...

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  7. Shows a wire of length l which can slide on a U- shaped rail of neglig...

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  8. Consider the situation of the previous problem. (a) Calculate the forc...

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  9. Consider the situation shown in . The wire PQ has mass m, resistance r...

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  10. A rectanguar frame of wire abcd has dimensions 32cm X 8.0 cm and a tot...

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  11. Shows a metallic wire of resistance 0.20 Omega sliding on a horizontal...

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  13. Consider the situation shown in figure. The wires P1Q1 and P2Q2 are ma...

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  14. Suppose the 19 Omega resistor of the previous problem is disconnected....

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  15. Consider the situation shown in . The wire PQ has a negligible resist...

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  16. The current generator I g, shown in . Sends a constant current I throu...

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  17. The current generator ig, shown in , sends a constant current I throu...

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  18. The system containing the rails and the wire of the previous problem i...

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  19. The rectangualr wire- frame, shown in has a width d, mass m, resist...

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