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(a) How is an electromagnet different fr...

(a) How is an electromagnet different from a permanent magnet?
(b) Write two properties of a material which make it suitable for making electromagnets.

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(b) A material is suitable for making electromagnets if its relative permeability is high but retentivity and coercivity both are small.
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U-LIKE SERIES-MAGNETISM AND MATTER-SHORT ANSWER QUESTIONS
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  2. A magnetic compass needle of magnetic moment 60 A-m^2 is placed at a p...

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  3. State two characteristic properties distinguishing the behaviour of pa...

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  4. How will you distinguish a diamagnetic substance from a paramagnetic s...

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  5. State and explain Curie's law in magnetism.

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  6. Why does a paramagnetic substance display greater magnetisation for th...

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  7. Show diagrammatically the behaviour of magnetic field lines in the pre...

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  8. Define magnetic susceptibility of a material. Name two elements, one h...

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  9. Out of the two magnetic materials, 'A' has relative permeability sligh...

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  10. The susceptibility of a magnetic material is - 2.6 xx 10^(-5). Identi...

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  11. (a) Define the term magnetic susceptibility and write its relation in ...

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  12. The susceptibility of a magnetic material is 0.9853. Identify the type...

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  13. The susceptibility of a magnetic material is -1.6xx 10^(-5). Identify ...

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  14. (a) How is an electromagnet different from a permanent magnet? (b) W...

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  15. Write two properties of a material suitable for making (a) a permanent...

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  16. The horizontal component of the earth's magnetic field at a place is 1...

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  17. Figure shows the variation of intensity of magnetisation vecM versus t...

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  18. A magnetic needle free to rotate in a vertical plane parallel to the m...

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  19. (i) Write two characteristics of a material used for making permanent ...

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  20. A ball of superconducting material is dipped in liquid nitrogen and pl...

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