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A thin semicircular conducting ring of r...

A thin semicircular conducting ring of radius `R` is falling with its plane verticle in a horizontal magnetic inducting `B`. At the position `MNQ`, the speed of the ring is `V` and the potential difference developed across the ring is

A

zero

B

`BV piR^2/V` and M is at higher potential

C

`piRBV` and Q is at higher potential

D

2RBV and Q is at higher potential

Text Solution

Verified by Experts

The correct Answer is:
D
emf=bvl
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NARAYNA-ELECTROMAGNETIC INDUCTION-EXERCISE-1 (C.W)
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  2. A metal bar of length 1 m falls from rest under the action of gravity ...

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  3. A thin semicircular conducting ring of radius R is falling with its pl...

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  4. Two thick rods AB, CD are placed parallel to each other at a distance ...

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  5. A conducting ring of radius 'r' is rolling without slipping with a con...

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  6. A cycle wheel with 64 spokes is rotating with N rotations per second a...

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  7. A uniform circular metal disc of radius R is rotating about a vertical...

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  8. a copper disc of diameter 20 cm makes 1200 r.p.m. about its natural ax...

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  9. In an AC generator, a coil with N turns, all of the same area A and to...

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  10. A flat circular coil having N turns (tightly wound D) is placed in a t...

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

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  12. A solenoid have self inductance 2H. If length of the solenoid is doubl...

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  13. A solenoid is wound over a rectangular frame. If all the linear dimens...

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  14. Two coils A and B having turns 300 and 600 respectively are placed nea...

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  15. The number of turns of primary and secondary coils of a transformer ar...

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  16. Two conducting circular loops of radii R1 and R2 are placed in the sa...

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  17. If the length and area of cross-section of an inductor remain same but...

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  18. Two inductors each of inductance L are joined in parallel. Their equiv...

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  19. An air-cored coil has a self-inductance of 0.1 H. A soft iron core of ...

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  20. A solenoid is 1.5 m long and its inner diameter is 4.0 cm . It has thr...

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