A person observes that a magnet attracts the iron bar when kept next to it. What inferences could be drawn from this observation?

Magnets have magnetic field around them.

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Iron is a magnetic material.

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Iron nails are light weighted.

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Magnets can induce magnetism in other magnetic materials.

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Solution

The correct options are
A Magnets have magnetic field around them.
B Iron is a magnetic material.
D Magnets can induce magnetism in other magnetic materials.
When a magnet is kept closer to the iron bar, due to magnetism of bar magnet, magnetic properties are induced in the iron bar. The iron bar starts acting like a magnet till the magnet is kept closer to it. When the magnet is moved away, the iron bar loses its magnetic properties.

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Question 18

Boojho kept a magnet close to an ordinary iron bar. He observed that the iron bar attracts a pin as shown in the figure.

What inference could he draw from this observation? Explain.

Non - magnetic materials: Rubber, wood, plastic
Magnetic materials: Steel, iron nails, cobalt.

_______ is the property of magnet by which it attracts iron pieces or other magnetic materials.

what are the the chemical changes that take place to an iron bar if magnetised.? what will it's its configuration be? what is exactly happening when a magnet attracts another magnet or iron? do electromagnets have poles?what are exactly magnetic poles?

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)
(e) If a magnet attracts a piece of metal, that piece must be made of ............. .
(any other metal but iron, magnetic material or iron, non-magnetic material)
(f) A magnet remains steady in a .............. direction.
(east-west, north-south)

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