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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
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AAKASH INSTITUTE-MAGNETISM AND MATTER -ASSIGNMENT (SECTION C)
  1. There are four light-weight-rod sample A, B, C, D separately suspended...

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

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

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

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  5. A closely wound solenoid of 2000 turns and area of cross-section 1.5 x...

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  6. The magnetic moment of a diamagnetic atom is

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  7. A thin ring of radius R metre has charge q coulomb uniformly spread ...

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  8. A bar magnet having a magnetic moment of 2 xx 10 ^(4) JT ^(-1) is free...

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

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  10. Curie temperature is the temperature above which

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

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  12. Above curie temperature

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

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

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  15. A bar magnet of magnetic moment vec(M) is placed in a magnetic field o...

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  16. Tangent galvanometer is used to measure

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

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  18. Due to the earth's magnetic field, charged cosmic ray particles

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  19. For protecting a sensitive equipment from the external magnetic field,...

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  20. Two bar magnets having same geometry with magnetic moments M and 2M, a...

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