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What the advantages of an electromagnet ...

What the advantages of an electromagnet ?

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Advantages of an electromagnet:
They can be made stronger than any other permanent magnet.
These can be magnetized and demagnetized easily.
Increasing the amount of current increases the strength of the electromagnet.
Poles of an electromagnet can be interchanged by changing the direction of current.
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PEARSON IIT JEE FOUNDATION-THE MAGICAL MAGNETISM -TEST YOUR CONCEPTS(Short Answer Type Questions)
  1. Define the following terms. Magnetic axis

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  2. Define the following terms. Length of a bar magnet

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  3. What is the effective length of a bar magnet ?

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  4. Define pole, axis, equator and magnetic meridian of a bar magnet

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  5. What the the properties of a bar magnet ?

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  6. What the advantages of an electromagnet ?

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  7. Mention some of the applications of a magnet .

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  8. Differentiate between temporary and permanent migrants.

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  9. What is meant by dipole in magnetism?

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  10. What is meant by magnetizing a material and how does this happen ?

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  11. The bar magnet suspended freely aligns itself in the north-south direc...

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  12. What is the use of compass for sailors ?

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  13. Why are the magnets used in earphones or speakers?

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  14. A boy playing in sand with a magnet notices some dust or particles att...

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  15. Match the following columns.

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  16. Explain with diagram what happens when a bar magnet is cut into two pi...

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  17. Consider a magnet which is hung by the hook of a spring as shown in fi...

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  18. Which of the following arrangements produces a stronger electromagnet ...

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  19. Which of the following arrangements produces a stronger electromagnet ...

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  20. Consider a magnet which is hung to the hook of a spring as shown in fi...

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