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Two identical north poles each of streng...

Two identical north poles each of strength `m` are kept at vertices `A` and `B` of an equilateral triangle `AbC` of side a. The mutual force of repulsion between them has a magnitude of `F`. The magnitude of magnetude at `C` is

A

F/m

B

`F//sqrt3m`

C

F/3m

D

`sqrt3F//m`

Text Solution

Verified by Experts

The correct Answer is:
D
`B=mu_(0)/(4pi)m/d^(2),F=mu_(0)/(4pi)(m_(1)m_(2))/d^(2)`
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NARAYNA-MAGNETISM AND MATTER-EXERCISE - 2 (C.W)
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  3. Two identical north poles each of strength m are kept at vertices A an...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  20. The period of a thin magnet in a magnetic field is 2s. It is cut into ...

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