6th Grade > Physics
FUN WITH MAGNETS MCQs
Total Questions : 99
| Page 4 of 10 pages
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Each magnet has a tiny north and south pole. If you cut one in half, the newly cut faces will become the new north or south poles of the smaller pieces. Hence, the total number of poles will be four.
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Difference: 2 Marks
Examples: 1 Mark
The materialswhich areattracted towards a magnetare known as magnetic materials. For example- iron, cobalt etc.
The materials which are not attracted towards a magnet are known as non-magnetic materials. For example- plastic, glass etc.
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Destroying magnetic properties: 2 Marks
Safety: 3 Marks
Magnets lose their properties if they are heated, hammered or dropped from some height. Also, magnets become weak if they are not stored properly.
Ways to keep magnets safe:
1. Theyshould be kept in pairs with their unlike poles on the same side.
2. For horseshoe magnet, one should keep a piece of iron across the poles.
3.Take care to protect the magnet against mechanical shock. Some magnets are brittle. They will crack or break if they fall on a hard surface or bang against metal or another magnet. Do not strike them with a hammer.
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Answer: 2 Marks
Iron nails, nickel, steel pen, and cobalt will be attracted to magnet and rest of the materials are non-magnetic in nature, so they will not be attracted toamagnet.
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Each Point: 1 Mark
1.A magnet attracts magnetic materials towards itself.
2.A freely suspended bar magnet always aligns in the north-south direction.
3.Unlike poles attract each other and like poles repel each other.
Answer: Option A. -> ends
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A
Most of the pins stick at the two extreme ends of the bar magnet because the magnetic field is maximum at the ends of the magnet. The ends of the magnetwhere the strength of the magnet is highest are called the poles of a magnet.
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A
Most of the pins stick at the two extreme ends of the bar magnet because the magnetic field is maximum at the ends of the magnet. The ends of the magnetwhere the strength of the magnet is highest are called the poles of a magnet.
Answer: Option A. -> True
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A
One can transform aniron metal intoamagnet by rubbing a magnet on the surface of the iron metal bar.
Position the magnet against the iron rod suchthat only the chosen pole is touching the rod. Begin at one end of the rod and rub the magnet down the length of the rod in one continuous movement.
Due to the rubbing of magnet, the magnetic domains in iron piece will be aligned in one direction, after which the iron barwill start behavinglike a magnet.
This can be visualised by the diagram given below.
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A
One can transform aniron metal intoamagnet by rubbing a magnet on the surface of the iron metal bar.
Position the magnet against the iron rod suchthat only the chosen pole is touching the rod. Begin at one end of the rod and rub the magnet down the length of the rod in one continuous movement.
Due to the rubbing of magnet, the magnetic domains in iron piece will be aligned in one direction, after which the iron barwill start behavinglike a magnet.
This can be visualised by the diagram given below.
Answer: Option C. -> Plastic
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C
Cobalt, iron and nickel are attracted toa magnet.Hence, they are magnetic materials. Whereas, plastic can neither be magnetised nor it gets attracted toamagnet. Thus, it is a non-magnetic material.
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C
Cobalt, iron and nickel are attracted toa magnet.Hence, they are magnetic materials. Whereas, plastic can neither be magnetised nor it gets attracted toamagnet. Thus, it is a non-magnetic material.