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Temporary and Permanent Magnets

What role doe...

Question

What role does the magnetic induction play in the attraction of a piece of a soft iron bar by a magnet?

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Solution

Induction helps in the process of attraction of magnetic materials.
Magnetic induction first induces the magnetic property in a soft iron bar.
Then, this iron bar itself becomes a magnet.
Finally this magnetised iron bar is attracted towards the magnet.

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Explain what do you understand by magnetic induction. What role does it play in attraction of a piece of iron by a magnet ?

Q. You are given a piece of iron and a bar magnet. How can you magnetize the piece of iron?

Q. Fill in the blanks with the appropriate word.
(a) If a bar magnet is hung by a thread tied at its centre, its north pole becomes steady in the direction of the ................ Pole of the earth.
(South, north, east, west)
(b) If a bar magnet is cut into equal pieces by cutting it at right angles to its axis at two places, ........... bar magnets are formed, and a total of ................ poles are formed.
(6,3,2)
(c) There is repulsion between the .......... poles of a magnet, and attraction between its ............ poles.
(opposite, like.)
(d) When magnetic material is taken close to a magnet, the material acquires ............... .
(permanent magnetism, induced magnetism)
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(f) A magnet remains steady in a .............. direction.
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Can we magnetize an iron piece permanently by the method of magnetic induction?

As shown in the figure a staring bar magnet A is brought near to a piece of soft iron B. Indicate the magnetic poles induced on B

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Temporary and Permanent Magnets

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