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A compose needle which is allowed to mov...

A compose needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It

A

will oscillate

B

will be aligned to north-south direction.

C

will be aligned to east-west direction

D

will be aligned to random direction

Text Solution

Verified by Experts

The correct Answer is:
D
Magnetic field on geomagnetic poles is vertical and hence will be applied perpendicular to plane of rotation of compass needle. Magnetic field will not be able to apply torque on needle to rotate it in horizontal plane. Hence magnetic needle will stay in random orientation.
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MODERN PUBLICATION-MAGNETISM AND MATTER-COMPETITION FILE (OBJECTIVE TYPE QUESTION ( ( A ) MULTIPLE CHOICE QUESTION))
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  2. The permanent magnetic moment of the atoms of a material is zero. The ...

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  3. A magnetised steel wire of length L has a magnetic moment of 3.14 Am^(...

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  4. The angle of dip at the magnetic equator is

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  5. A paramagnetic material is placed in a magnetic field. Consider the fo...

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  6. Points A and B are located along a line perpendicular to the axis of a...

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  7. A sample of paramagnetic material is placed in an external magnetic fi...

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  8. Two short bar magnets are taken and fastened together perpendicularly ...

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  9. A dip circle is taken to geomagnetic equator. The needle is allowed to...

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  10. Explain what is meant by neutral points? How will you calculate magnet...

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  11. Two short bar magnets of magnetic moments m each are arranged at the o...

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  12. A magnetised wire of moment M is bent into an arc of a circle subtendi...

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  13. At a certain place , the horizontal component of earth's magnetic fie...

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  14. When current is doubled deflection is also doubled in

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  15. Suggest a material that can be used to make a permanent magnet.

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  16. Length of a very long bar magnet is kept along the axis of a circular ...

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  17. If a bar magnet of pole strength m and magnetic moment M is cut equall...

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  18. When a ferromagnetic material is heated above its Curie temperature , ...

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  19. If at a certain place BH and BV are horizontal and vertical componen...

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  20. The magnetic moments of two bar magnets of same size are in the ratio ...

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