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Demagnetisation of a magnet can be done ...

Demagnetisation of a magnet can be done by

A

rough handling

B

magnetising in the opposite direction

C

heating

D

all the above

Text Solution

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The correct Answer is:
A, B, C, D
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FULL MARKS-MAGNETISM AND MAGNETIC EFFECTS OF ELECTRIC CURRENT -ADDITIONAL QUESTIONS SOLVED
  1. A bar magnet of magnetic moment M is cut into two parts of equal lengt...

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  2. A magnetic needle suspended by a silk thread is vibrating in the earth...

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  3. Demagnetisation of a magnet can be done by

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  4. All the magnetic materials lose their magnetic properties when

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  5. The relative permeability of a paramagnetic material is

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  6. The relative permeability of a diamagnetic material is

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  7. Which of the following is most suitable for the core of an electromagn...

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  8. Soft iron is used in many parts of electrical machines for

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  9. When a diamagnetic substance is brough near the north or the south pol...

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  10. At Curie point, a ferromagnetic material becomes

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  11. Magnetic permeability is maximum for

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  12. The material of a permanent magnet has

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  13. Which one of the following is not made of soft iron ?

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  14. A dip circle is at right angles to the magnetic meridian. The apparent...

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  15. A magnetic needle is placed in a uniform magnetic field. It experienec...

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  16. Relative permeability of iron is 5500. Its magnetic susceptibility is

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  17. The inherent property of all matter is

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  18. A magnetic needle suspended freely

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  19. The earth's magnetic field at a given point is 0.5 xx 10^(-5) Wb m^(2)...

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  20. A frog can be leviated in a magnetic field produced by a current in a ...

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