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Magnetic intensity for an axial point du...

Magnetic intensity for an axial point due to a short bar magnet of magnetic moment `M` is given by

A

`mu_(0)/(4pi)xxM/d^(3)`

B

`mu_(0)/(4pi)xxM/d^(2)`

C

`mu_(0)/(2pi)xxM/d^(3)`

D

`mu_(0)/(2pi)xxM/d^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
`B_(a)=mu_(0)/(4pi)(2M)/d^(3)=mu_(0)/(2pi)M/d^(3)`
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A2Z-MAGNETISM AND MATTER-Section D - Chapter End Test
  1. A magnet is suspended horizontal in the earth's magnetic field. When i...

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  2. The field due to a magnet at a distance R~ from the centre of the magn...

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  3. A long magnet is cut in two parts in such a way that the ratio of thei...

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  4. If the magnetic flux is expressed in weber, then magnetiv induction ca...

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  5. Magnetic intensity for an axial point due to a short bar magnet of mag...

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  6. A small rod of bismuth is suspended freely between the poles of a stro...

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  7. Magnetic moment of two bar magnets may be compared with the help of

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  8. At place, the magnitudes of the horizontal component and total intensi...

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  9. The angle of dip at a certain place is 30^(@). If the horizontal compo...

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  10. The horizontal component of the earth's magnetic field is 0.22 Gauss a...

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  11. Earth's magnetic field always has a horizontal component expert at or ...

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  12. The magnet of a vibration magnetometer is heated so as to reduce its m...

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  13. A magnet is suspended in such a way that it oscillates in the horizont...

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  14. The plane of dip circle is set in the geographic meridian and the appa...

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  15. At 45^(@) to the magnetic meridian the apparent dip is 60^(@). The tru...

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  16. Two short magnets of magnetic moment 2 Am^(2) and 5 Am^(2) are placed ...

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  17. A rectangular toroid has 1000 turns. The ratio of the outer to inner d...

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  18. Assertion: The poles of magnet cannot be separated by breaking into tw...

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  19. Assertion: Electromagnets are made of soft iron. Reason: Coercivity ...

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  20. Assertion: To protect any instrument from external magnetic field, it ...

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