Magnetism

Samacheer Book Back Questions And Answers For Science Standard 6 Term 3 “Magnetism“

I. Choose the correct answer:
1. An object that is attracted by a magnet.
(a) Wooden piece
(b) Plain pins
(c) Eraser
(d) A piece of paper

2. People who made mariner’s compass for the first time.
(a) Indians
(b) Europeans
(c) Chinese
(d) Egyptians

3. A freely suspended magnet always comes to rest in the direction
(a) North-east
(b) South-west
(c) East-west
(d) North-south

4. Magnets lose their properties when they are
(a) Used
(b) Stored
(c) Hit with a hammer
(d) Cleaned

5. Mariner’s compass is used to find the
(a) Speed
(b) Displacement
(c) Direction
(d) Motion

II. Fill in the Blanks:
1. Artificial magnets are made in different shapes such as _____, _____ and _____.
2. The Materials which are attracted towards the magnet are called _____.
3. Paper is not a _____ material.
4. In olden days, sailors used to find direction by suspending a piece of _____.
5. A magnet always has _____ poles.

Answers:
1. Oval shape, Disc Shape, cylindrical shape
2. Magnetic materials
3. Magnetic
4. Lodestone
5. Two

III. True or False. If False, give the correct answer:
1. A cylindrical magnet has only one pole.
2. Similar poles of a magnet repel each other.
3. Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
4. A compass can be used to find East-West direction at any place.
5. Rubber is a magnetic material.

Answers:
1. False (A cylindrical magnet has two poles)
2. True
3. False (Maximum iron fillings stick in the poles of a bar magnet)
4. False (A compass can be used to find north-south direction at any place, can also find east west)
5. False (Rubber is a non-magnetic material)

IV. Match the following:
1. Compass             A. Maximum magnetic strength
2. Attraction            B. Like poles
3. Repulsion            C. Opposite poles
4. Magnetic poles   D. Magnetic needle

Answers:
1. D
2. C
3. B
4. A

V. Circle the odd ones and give reasons:
1. Iron, nail, pins, rubber tube, needle
2. Lift, escalator, electromagnetic train, electric bulb
3. Attraction, repulsion, pointing direction, illumination

Answers:
1. Rubber tube is a non-magnetic substance. All others are magnetic substance.
2. Electromagnet is not used in an electric bulb.
3. Illumination is not a magnetic property. All others have magnetic property.

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