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A magnetic needle suspended horizontally...

A magnetic needle suspended horizontally by an unspun silk fibre, oscillates in the horizontal plane because of the restoring force originating mainly from

A

the torsion of the silk fibre

B

the force of gravity

C

the horizontal component of earth's magnetic field

D

All the above factors

Text Solution

Verified by Experts

The correct Answer is:
C
The restoring force will mainly be originating from the horizontal component of earth's magnetic field.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-MAGNETISM-I-Exercise 2
  1. The angle between the earth's magnetic axis and the earth's geographic...

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  2. If a magnet is hanged with its magnetic axis then it stops in

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  3. A dip needle in a plane perpendicular to magnetic meridian will remain

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  4. A dip circle is at right angles to the magnetic meridian. What will be...

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  5. A magnetic needle suspended horizontally by an unspun silk fibre, osci...

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  6. Two lines of force due to a bar magnet

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  7. If a magnet of pole strenth m is divided into four parts such that the...

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  8. Torques tau(1) and tau(2) are required for a magnetic needle to remain...

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

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  10. At the magnetic north pole of the earth, the value of horizontal compo...

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  11. Magnetic dip was measured at various places on earth in one of the fol...

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  12. A magnet of magnetic moment M amd pole strenth m is divided in two equ...

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  13. A bar magnet when placed at an angle of 30^(@) to the direction of mag...

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  14. A toroid of n turns, mean radius R and cross-sectional radius a carrie...

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  15. The earth's magnetic field at a certain place has a horizontal compone...

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  16. A bar magnet of legth 3cm has point A and B along its axis at distance...

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  17. Two short magnets of equal dipole moment M are fastened perpendicularl...

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

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  19. Two short magnets of magnetic moment 1000 A-m^(2) are placed as shown...

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

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