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Which of the following is correct ?...

Which of the following is correct ?

A

The magnetic field lines need not be perpendicular to the surface from which they originate

B

Complete magnetic shielding is not possible

C

Curie point is the critical temperature below which a substance behaves as super conductor

D

A bar magnet's dipole moment can be always determined in the presence of an external field

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The correct Answer is:
A
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AAKASH INSTITUTE-MAGNETISM AND MATTER -Assignment Section - A Objective Type Questions (One option is correct)
  1. Which of the following is incorrect ?

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  2. Magnetic susceptibility of the following type does not depend upon tem...

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  3. Which of the following is correct ?

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  4. If a bar magent is placed with its north pole pointing towards geograp...

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  5. The magnetic moment of a diamagnetic substance is

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  6. The susceptibility of a perfectly diamagnetic substance is

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  7. Liquid oxygen remains suspended between two pole faces of a magnet bec...

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  8. The magnetic flux has the dimension

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  9. Which of the following is incorrect ?

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  10. A magnet of magnetic moment M and having moment of inertia I , is susp...

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  11. The permeability of a specimen decreases drastically above certain tem...

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  12. Which of the following materials would weaken the magnetic field stren...

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  13. A magnetic needle lying parallel to a magnetic field requires X units ...

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  14. A hydrogen atom is a paramagnetic. A hydrogen molecule is –

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

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  16. A diamagnetic substance when placed gently in a magnetic field moves

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  17. A frog can be levitated in a strong magnetic field below it . This is ...

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  18. The direction of the null point is on the equatorial line of a bar mag...

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

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  20. Two similar magnets of magnets moments M(1) and M(2) are taken and vib...

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