Match the items in column I with the correct choices in column II. Column I Column II 1 . Soft iron a. magnetic needle 2 . Steel b. Alnico 3 . Used in large computers c. ferrite magnet 4 . Magnet made from a mixture of iron oxide and barium oxide d. permanent magnet 5 . Magnet made from a mixture of aluminium, nickel and cobalt. e. magnetic tapes f. magnetic games g. ceramic magnet h. directive property i. temporary magnet

1 . Soft iron i. temporary magnet Explanation The materials retain their magnetism for short period are called temporary magnets. Soft iron is used in making electromagnet which acts as a strong magnet until current flows through the coil. It loses its magnetism once the current stops flowing through circuit. 2 . Steel a. magnetic needle d. permanent magnet Explanation The materials retain their magnetism permanently are called permanent magnets. Steel is used in making permanent magnet and magnetic needle. 3 . Used in large computers e. magnetic tapes Explanation Magnetic tapes are used in large computers to store the data in the form of digital information. These are inexpensive. 4 . magnet made from a mixture of iron oxide and barium oxide c. ferrite magnets g. ceramic magnet Explanation Ferrite magnets or ceramic magnets are formed by a mixture of iron oxide and barium oxide. Such magnets are difficult to demagnetize and are used to make permanent magnets. 5 . magnet made from a mixture of aluminium, nickel and cobalt. b. Alnico Explanation Alnico is an abbreviation, which is used for an alloy made up of Aluminium, Nickel, and Cobalt. It is an alloy, which is ferromagnetic substances. These alloys also contain titanium and copper sometimes. Permanent magnets can be made from these materials. Column I Column II 1 . Soft iron i. temporary magnets 2 . Steel a. magnetic needle d. permanent magnet 3 . used in large computers e. magnetic tapes 4 . magnet made from a mixture of iron oxide and barium oxide c. ferrite magnets g. ceramic magnet 5 . magnet made from a mixture of aluminum, nickel and cobalt. b. Alnico f. magnetic games h. directive property

The property or virtue by which the materials such as iron or steel, possess the property of attracting different metal material such as cobalt, nickel, and iron. Some materials, such as lodestone are naturally occuring magnetic substances. However, some metals do not exhibit the property of magnetism, such as aluminium, gold, and copper.

E M B I B E

Its All About Science Physics For Middle School 6>Chapter 6 - Magnetism>EXERCISE>Q C

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Earn 100

Soft iron is used to make an electromagnet.

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Important Questions on Magnetism

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Its All About Science Physics For Middle School 6>Chapter 6 - Magnetism>EXERCISE>Q D

Find the odd one out. Give a reason for your choice.

Horseshoe magnet, U-shaped magnet, a bar magnet, lodestone, conical magnet.

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Its All About Science Physics For Middle School 6>Chapter 6 - Magnetism>EXERCISE>Q D

Find the odd one out. Give the reason for the choice.

Magnetic separation, single touch method, double touch method, magnetic induction.

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Its All About Science Physics For Middle School 6>Chapter 6 - Magnetism>EXERCISE>Q D

Find the odd one out. Give the reason for the choice.

Iron, nickel, cobalt, aluminium.

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Its All About Science Physics For Middle School 6>Chapter 6 - Magnetism>EXERCISE>Q D

Choose the odd one out.
Plastic, brass, iron, copper, zinc.

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Its All About Science Physics For Middle School 6>Chapter 6 - Magnetism>EXERCISE>Q E

Match the items in column I with the correct choices in column II.

Column I	Column II
$1$ . Soft iron	a. magnetic needle
$2$ . Steel	b. Alnico
$3$ . Used in large computers	c. ferrite magnet
$4$ . Magnet made from a mixture of iron oxide and barium oxide	d. permanent magnet
$5$ . Magnet made from a mixture of aluminium, nickel and cobalt.	e. magnetic tapes
	f. magnetic games
	g. ceramic magnet
	h. directive property
	i. temporary magnet