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Difference between Electromagnets and Permanent Magnets

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Question

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

A

Conduction

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B

Magnetism

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C

Galvanisation

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D

Electrolysis

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Solution

The correct option is (D) Magnetism.
A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include the elements iron, nickel and cobalt and their alloys, some alloys of rare-earth metals, and some naturally occurring minerals such as lodestone.
The property of a magnet by which it attracts iron pieces or other magnetic materials is called magnetism.

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Similar questions

Q. Fill in the blanks with the correct words.
1. Only ..................... (magnetic/non-magnetic) materials are attracted by magnets.
2. Like poles of two magnets ..................... (attract/repel) each other.
3. A magnet that retains its properties for a very long period of time is called ..................... (electro/permanent) magnet.
4. A horseshoe magnet should be stored with a piece of ..................... (plastic/iron) across its poles.
5. A ......................................... (credit card/magnetic compass) is a devicer used to find directions.

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)

Q. A magnet attracts iron pieces.

Q. A naturally occurring magnet that can attract iron and other substances which have magnetic properties is called as a ___ .

Which of the following statement is/are true

(i) As long as a metal has some iron in it, you can magnetize it using a magnet

(ii) A magnet is an oxide of iron, hence materials which have iron or is an oxide of iron can be made into a temporary magnet.

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