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Two conducting rings of radii r and 2r m...

Two conducting rings of radii `r` and `2r` move in apposite directions with velocities `2 upsilon` and `upsilon` respectively on a conducting surface `S`. There is a uniform magnetic field of magnitude `B` perpendicular to the plane of the rings. The potential difference between the highest points of the two rings is

A

zero

B

`2rvB`

C

`4rvBr`

D

`10rvB`

Text Solution

Verified by Experts

The correct Answer is:
D
`V_(A)-e_(1)-e_(2)=V_(C) implies V_(A)-V_(C)=e_(1)+e_(2)=10Bvr` .
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CP SINGH-ELECTROMAGNETIC INDUCTION-EXERCISES
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  2. A thin semicircular conducting ring of radius R is falling with its pl...

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  3. Two conducting rings of radii r and 2r move in apposite directions wit...

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  4. The conductor ABCDE has the shape shown. It is lies in the YZ plane, w...

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

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  6. The magnetic field in a region is given by vec B = veck (B0)/(L) y whe...

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  7. Consider the following statements: (a)An emf can be induced by moving ...

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  8. A conducting loop is placed in a uniform magnetic field with its plane...

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  9. A magnet is moving towards a coil along its axis and the emf induced i...

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  10. As shown in the figure, a magnetic is moved with a a fast speed toward...

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  11. A metal rod length l rotates about on end with a uniform angular velo...

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  12. if rod is rotated about an axis passing through its mid-point , the po...

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  13. A metal conductor of length 1m rotates vertically about one of its end...

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  14. A metal rod of resistance R is fixed along a diameter o fa conducting ...

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  15. A conducting disc of radius r spins about its axis an angular velocity...

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  16. Three indential rings move with same speed on a horizontal magnetic fi...

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  17. A uniform but time-varying magnetic field B(t) exists in a circular re...

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  18. The inductance of a coil is proportional to

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  19. When the number of turns and the length of the solenoid are doubled ke...

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  20. A long solenoid has 500 turns. When a current of 2A is passed through ...

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