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A bar magnet of magnetic moment 3.0 A-m^...

A bar magnet of magnetic moment `3.0 A-m^(2)` is placed in a uniform magnetic induction field of `2xx10^(-5)T`. If each pole of the magnet experiences a force of `6xx10^(-4)N`, the length of the magnet is

A

0.5m

B

0.3m

C

0.2m

D

0.1m

Text Solution

Verified by Experts

The correct Answer is:
D
F = mB
M = `mxx2l`
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NARAYNA-MAGNETISM AND MATTER-EXERCISE - 2 (C.W)
  1. A bar magnet of magnetic moment 'M' is bent in the form of an arc whic...

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  2. At two corners A and B of an equilateral triangle ABC, a south and no...

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  3. A bar magnet of magnetic moment 3.0 A-m^(2) is placed in a uniform mag...

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  4. The magnetic induction at a distance 'd' form the magnetic pole of unk...

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  5. Two identical north poles each of strength m are kept at vertices A an...

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  6. Two magnets of magnetic moments M and sqrt3M are joined to form a cros...

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  7. The rate of change of torque 'tau' with deflection theta is maximum fo...

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  8. The couple acting on a bar magnet of pole strength 2 Am when kept in a...

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  9. A bar magnet with poles 25cm apart and pole strength 14.4 Am rests wit...

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  10. Two magnets of moments M(1) and M(2) are rigidly fixed togetherat thei...

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  11. A short magnet placed with its axis making an angle with a uniform ext...

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  12. Two short bar magnets of equal dipole moments 'M' each are fastened pe...

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  13. The small magnets each of magnetic moment 10 A-m^(2) are placed end-on...

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  14. The ratio of magnetic fields on the axial line of a long magnet at dis...

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  15. Two short magnets AB and CD in the X-Y plane and are parallel to X-axi...

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  16. Two identical short bar magnets, each having magnetic moment M, are pl...

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  17. Magnetic inducton at a point on the axial line of a short bar magnet i...

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  18. A magnetic dipole is under the inflluence of two magnetic fields havin...

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  19. A short bar magnet is placed with its south pole facing geographic sou...

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  20. A bar magnet is placed with its North pole pointing North. Neutral poi...

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