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Electromagnets are made of soft iron bec...

Electromagnets are made of soft iron because soft iron has

A

High retentivity and low coercive force

B

Low retentivity and high coercive force

C

High retentivity and high coercive force

D

Low retentivity and low coercive force

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The correct Answer is:
A
Electromagnets are made of soft iron because soft iron has high retentivity and low coercive force
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NARAYNA-MAGNETISM AND MATTER-EXERCISE - 3
  1. Correct relation between magnetic field B, Magnetic intensity H and in...

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  2. Which of the following material has zero magnetic moment of single ato...

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  3. Relation between mu(r)andchi will be

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  4. If the magnetic dipole of moment of an atom of diamagnetic material, p...

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  5. Above Curie temperature

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  6. Nickel shows ferromagnetic property at room temperature. If the temper...

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  7. Curie temperature is the temperature above which

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  8. A bar magnet having a magnetic moment of 2xx10^(4) JT^(-1) is free to ...

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  9. If a diamagnetic substance is brought near north or south pole of a ba...

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  10. Two identical bar magnets are fixed with their centres at a distance d...

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  11. The magnetic moment of a diamagnetic atom is

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  12. A vibration magnetometer placed in magnetic meridian has a small bar m...

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  13. Electromagnets are made of soft iron because soft iron has

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  14. A short bar magnet of magnetic moment 0*4JT^-1 is placed in a uniform ...

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  15. There are four light-weight-rod sample A, B, C, D separately suspended...

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  16. A magnetic needle suspended parallel to a magnetic field requires sqrt...

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  17. A compose needle which is allowed to move in a horizontal plane is tak...

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  18. A bar magnet of length l and magnet dipole moment M is bent in the for...

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  19. Following figures show the arrangement of bar magnets in different con...

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  20. The magnetic susceptibility is negative for

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