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A bar magnet of length 10cm and pole str...

A bar magnet of length `10cm` and pole strength `2 Am` makes an angle `60^(0)` with a uniform magnetic field of induction `50T`. The couple acting on it is

A

`5sqrt3Nm`

B

`sqrt3Nm`

C

`10sqrt3Nm`

D

`20sqrt3Nm`

Text Solution

Verified by Experts

The correct Answer is:
A
`C=MBsintheta`
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NARAYNA-MAGNETISM AND MATTER-EXERCISE - 1 (C.W)
  1. A magnet of length 10 cm and pole strength 4xx10^(-4)Am is placed in a...

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  2. A bar magnet of magnetic moment 2Am^(2) is free to rotate about a vert...

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  3. A bar magnet of length 10cm and pole strength 2 Am makes an angle 60^(...

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  4. The magnetic induction field strength at a distance 0.3 m on the axial...

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  5. A magnet of length 10 cm and magnetic moment 1Am^(2) is placed along t...

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  6. The length of a magnet of moment 5Am^(2) is 14cm. The magnetic inducti...

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  7. A pole of pole strength 80 Am is placed at a point at a distance 20cm ...

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  8. A short bar magnet produces manetic fields of equal induction at two p...

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  9. Two short bar magnets with magnetic moments 8Am^(2) and 27Am^(2) are p...

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  10. A short magnetic needle is pivoted in a uniform magnetic field of indu...

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  11. Two magnetic poles of pole strength 324 milli amp.m. and 400 milli amp...

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  12. With a standard rectangular bar magnet, the time period in the uniform...

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  13. A bar magnet of moment of inertia 1xx10^(-2)kgm^(2) vibrates in a magn...

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  14. Two bar magnets placed together in a vibration magnetometer take 3 sec...

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  15. A bar magnet of length 'I' breadth 'b' mass 'm' suspended horizontally...

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  16. The time period of a vibration magnetometer is T(0). Its magnet is rep...

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  17. A magnetic needle is kept in a uniform magnetic field of induction 0.5...

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  18. A magnet is suspended horizontally in the earth's field. The period of...

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  19. A magnet freely suspended makes 20 vibrations per minute at first plac...

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  20. A magnet has a dimensions of 25cmX10cmX5cm and pole strength of 200 mi...

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