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Consider the situation shown in figure. The wires P1Q1 and P2Q2 are made to slide on the rails with the same speed 5cm/sec . Find the electric current in the 19Ω resistor if (a) both the wires move towards right and (b) if P 1Q1 moves towards left but P2Q2 moves towards right.

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(a) The wires constitute 2 parallel emf Net emf =Blv=1×4×10 −2 ×5×10 −2 =20×10 −4 ...
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HC VERMA-ELECTROMAGNETIC INDUCTION-EXERCISE
  1. Shows a metallic wire of resistance 0.20 Omega sliding on a horizontal...

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  2. A wire ab of length l, mass m and resistance R slides on a smooth, thi...

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

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

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

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

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

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

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

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  10. Shows a smooth pair of thick metallic rails connected across a battery...

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  11. A conducting wire ab of length l, resistance r and mass m starts slidi...

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  12. A bicycle is resting on its stand in the east - west direction and the...

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  13. A conducting disc of radius r rotaes with a small but constant angul...

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  14. shows a conducting disc rotating about its axis in a perpendicular ma...

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  15. The magnetic field inn a region is given by vec B = veck (B0)/(L) y wh...

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  16. shows a straight, long wire carrying a current I and a rod of length l...

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  17. Consider a situation similar to that of the previous problem except th...

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  18. Shows a square frame of wire having a total resistance r placed coplan...

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  19. A rectangular metallic loop of length l and width b is placed coplan...

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  20. Shows a conducting circular loop of radius a placed in a uniform, perp...

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