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The materials suitable for making electr...

The materials suitable for making electromagnets should have

A

High retentivity and high coercivity

B

High retentivity and low coercivity

C

Low retentivity and high coercivity

D

Low retentivity and low coercivity

Text Solution

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-MAGNETISM AND MATTER -Assignment Section - B Objective Type Questions (One option is correct)
  1. The magnetic field lines inside a bar magnet

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

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  3. The materials suitable for making electromagnets should have

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  4. Magnetic susceptibility of diamagnetic substances depends upon the abs...

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

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  6. The true value of angle of dip at a place is 60^(@) . The apparent ang...

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  7. Two identical bar magnets of magnetic moment M each are inclined to 60...

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  8. A bar magnet of magnetic moment M is bent in the form of quadrant of c...

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  9. A thin rectangular magnet suspended freely has a period of oscillation...

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  10. A magnetic needle lying parallel to a magnetic field requires W units ...

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  11. The pole strength of a bar magnet is 48A-m and the distance between it...

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  12. Magnetic intensity for an axial point due to a short bar magnet of mag...

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  13. A small rod of bismuth is suspended freely between the poles of a stro...

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  14. A magnetic needls is kept in a non-unifrom magnetic field . It exper...

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  15. The magnet of vibration magnetometer is heated so as to reduce its mag...

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  16. Two bar-magnets having their moment of inertia in the ratio 2: 3 oscil...

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  17. A small magnetic needle performs 10 oscillations/minute in the earth's...

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

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  19. A steel bar of cross-sectional area A and length l is magnetised to de...

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  20. A dip circle is at right angles to the magnetic meridian. What w...

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