Question

Questions on Magnetism
1. Write the properties of: a) Bar magnet. (b) Magnetic field lines
2. Is attraction or repulsion, the surest test for magnetization? Justify your answer.
3. Define magnetic induction. Is it a temporary phenomenon or permanent. Why?
4. Why are the man made magnets preferred over a natural magnets?
5. State one evidence which proves the existence of Earth’s magnetic field.
6. What is a neutral point. What is the resultant magnetic field at this point?
7. Draw magnetic field lines of: (a) two bar magnets with their unlike poles facing each other.
(b) earth’s magnetic field in a limited region
8. Why does a freely suspended bar magnet always rests in geographic North – South direction?
9. Magnetic field lines are crowded near the poles. Why?
10.’Induction precedes attraction’. Explain the statement.

Answer 1

Answer:

Residual Induction: Given the symbol Br, and measured in Gauss, this is an indication of how strong the magnet is capable of being.

Coercive Force: Given the symbol Hc, and measured in Oersteds, this is an indication of how difficult it is to de-magnetize the magnet.

Maximum Energy Product: Given the symbol BHmax, and measured in Gauss-Oersteds, this is an indication of what volume of magnet material is required to project a given level of magnetic flux.

Explanation:

Answer 2

Answer:

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