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The material of a permanent magnet has...

The material of a permanent magnet has

A

high retentivity, low coercivity

B

low retentivity, low coercivity

C

low retentivity , low coercivity

D

high retentivity, high coercivity

Text Solution

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The correct Answer is:
C
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FULL MARKS-MAGNETISM AND MAGNETIC EFFECTS OF ELECTRIC CURRENT -ADDITIONAL QUESTIONS SOLVED
  1. At Curie point, a ferromagnetic material becomes

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  2. Magnetic permeability is maximum for

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  3. The material of a permanent magnet has

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

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

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

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

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  8. The inherent property of all matter is

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  9. A magnetic needle suspended freely

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

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

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  12. The magnetic moment of a current carrying circular coil of radius r va...

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  13. For a paramagnetic material, the dependence of the magnetic susceptibi...

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  14. A charged paticle (charge q ) is moving in a circle of radius R with u...

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

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  16. A proton enters a magnetic field of flux density 1.5 Wb/m^(2) with a s...

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  17. A moving charge produces

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  18. A straight conductor carrying a current I, is split into a circular lo...

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  19. In a moving coil galvanometer the current 'I' is related to the deflec...

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  20. The magnetic moment of a current carrying circular coil of radius r va...

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