Fun with magnets Worksheet-5
True or False:
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Soft iron can be highly magnetized but the magnetism in it is temporary.
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Magnets retain their magnetism even if they are strongly heated.
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The magnetic equator is an imaginary line parallel to the magnetic axis.
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Magnets are made of materials that attract objects made of certain substances such as iron, zinc, and nickel.
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Magnet was discovered by a Greek shepherd “Antonio”.
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Objects that are not attracted by magnet are said to be non-magnetic.
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The two magnetic poles: North and South can exist in isolation.
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The instrument in which a magnet is used to find directions is called a magnetic compass.
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Earth's magnetic north pole is geographic north pole.
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If a freely suspended magnet is allowed to rotate, it comes to rest such that its poles point in the Earth's north-south direction.
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Maglev had special arrangement of magnets that enabled the magnets to float over the track experiencing maximum mechanical friction.
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A piece of soft iron bar behaves like a electromagnet as long as the wire wound around it, carries current.
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All objects are not attracted to magnets.
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The magnetic compass always points in the east-west direction.
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Temporary magnets retain their property for a long time.
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A magnet can lose its properties on hammering.
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A horseshoe magnet should be kept with a piece of soft iron towards its poles.
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Bar magnets should be kept in pairs, with unlike poles alongside each other.
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Computer hard discs, audio and video cassettes have magnetic material that stores information.
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Ancient Chinese sailors used magnets for navigation.
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Credit cards and ATM cards have a strip of magnetic material that stores information.
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Earth behaves as a giant bar magnet.
Answer Key:
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True
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False
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False
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False
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False
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True
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False
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True
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False
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True
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False
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True
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True
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False
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False
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True
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False
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True
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False
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True
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True
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True