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How does the magnetic brake of a train work?

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MODERN PUBLICATION-MAGNETISM AND MATTER-REVISION EXERCISE (SHORT ANSWER QUESTION)
  1. Distinguish between paramagnetic and ferromagnetic substances.

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  2. Distinguish between diamagnetic and paramagnetic substances.

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  3. Give two points to distinguish between a paramagnetic and a diamagneti...

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  4. Depict the behaviour of magnetic field lines when (i) diamagnetic and ...

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  5. What is the basic difference between the atom/molecule of a diamagneti...

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  6. How will a dia, para and a ferromagnetic material behave when kept in ...

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  7. Electrons in a paramagnetic compound are

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  8. The magnetic moments of the domains in a ferromagnetic substance-

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  9. When a ferromagnetic material is heated to temperature above its Curie...

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  10. What difference between soft ferromagnetic materials and hard ferromag...

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  11. Differentiate between the properties of soft iron and steel.

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  12. Why is soft iron preferred for making the core of a transformer?

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  13. A bar magnet of magnetic moment 6 J//T is aligned at 60^(@) with a uni...

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  14. What are dia, para and ferro magnetic materials? Discuss their importa...

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  15. At a place, the horizontal component of earth's magnetic field is B an...

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  16. Write two properties of a material suitable for making (a) a perma...

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  17. How does the magnetic brake of a train work?

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  18. A short bar magnet placed with its axis at 30^(@) with a uniform exter...

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  19. The vertical and horizontal components of earth's magnetic at a place ...

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  20. शैथिल्य लूप (hysteresis loop) का क्षेत्रफल व्यक्त करता है-

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