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D., 1. Two properties of a bar magnet:I., Every bar magnet has two magnetic poles., II., Like poles of two magnets repel each other while their unlike poles attract each other., 2. As the attraction power is maximum near the two ends of a bar magnet, maximum iron filling stick there., 3. We are likely to observe a repulsion between two magnets., 4. Like poles of two magnets are facing each other so because of repulsion magnet X is floating., 5. If a knitting needle is placed near a bar magnet for some time it will acquire some magnetism., E., 1., Permanent magnet, Once made it stays as magnet, for long time., Steel, cobalt Steel are used to, make it., Its strength cannot be, increased., , Temporary magnet, It stays as magnet for a very short period of time., , Magnetic material, These are attracted towards, magnets, Example- iron, steel etc., , Non magnetic material, These are not attracted towards, magnets., Example- plastic, paper etc., , Soft iron and nickel are used to, make it., Its strength can be increased., , 2. (a) Point ‘a’ represents north point of Magnet P., (b) If end ‘d’ of magnet ‘Q’ is brought towards the end ‘b’ of magnet ‘P’ then both magnet will attract each, other., 3. The compass needle is pivoted at the centre and free to rotate a horizontal plane. It is fitted in a box with glass, cover and also a dial with directions marked., Use:- Compass is used to locate the directions at a place., 4.

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Proper storing helps the magnets to keep their strength for a long duration., 5. Magnets can lose their magnetism byi., Heating, ii., Dropping/hammering, iii., Not keeping in proper condition, 6. She must have tied the magnet with a thread and dipped it in water to take out the clip.