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A bar magnet is cut into two equal halve...

A bar magnet is cut into two equal halves by a plane parallel to the magnetic axis of the following physical quantities the one which remains unchanged is

A

pole strength

B

magnetic moment

C

intensity of magnetisation

D

moment of inertia

Text Solution

Verified by Experts

The correct Answer is:
c
(c) For each half `M=mxx2l` becomes half and volume `V=axx2l` also becomes half therefore, `I=M//V`, remains constant.
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DISHA PUBLICATION-MAGNETISM AND MATTER-EXERCISE-1:CONCEPT BUILDER (TOPICWISE)
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  4. A thin bar magnet of length 2 l and breadth 2 b pole strength m and ma...

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  5. Point A and B are situated along the extended axis of 2 cm long bar ma...

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  6. The net magnetic moment of two identical magnets each of magnetic mome...

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

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  8. A steel wire of length l has a magnetic moment M. It is bent into a se...

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  9. A steel wire of length l has a magnetic moment M. It is bent in L-shap...

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  10. A circular coil of 16 turns and radius 10cm carrying a current of 0.75...

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  11. Which of the following is responsible for the earth's magnetic field?

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  12. A compass needle whose magnetic moment is 60 Am^(2), is directed towar...

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  13. The horizontal component of the earth's magnetic field is 3.6 xx 10^(-...

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  14. The work done in turning a magnet of magnetic moment 'M' by an angle o...

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  15. A short magnet of length 4 cm is kept at a distance of 20 cm to the ea...

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  16. A short bar magnet with its north pole facing north forms a neutral po...

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

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  18. At a certain place , horizontal component of earth's field is sqrt3 ti...

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  19. At a certain place the angle of dip is 30^(@) and the horizontal compo...

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  20. A bar magnet is oscillating in the earth's magnetic field with a perio...

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