Answer the following questions:
1. What do you mean by magnet?
2. Define magnetic and non- magnetic materials.
3. How was magnet discovered?
4. How is a magnet used for finding direction?
5. List 5 uses of Magnets.
6. What is the main property of a bar magnet?
7. Name few magnets based on their shape.
Answers
1) An object which is capable of producing magnetic field and attracting unlike poles and repelling like poles.
2) Magnetic substances are substances that get attracted to magnets. Few of the magnetic substances are - iron, steel, cobalt and nickel. Non-magnetic substances are substances that do not get attracted by a magnet. Few of the materials are wood, plastic, copper, rubber.
3) The first magnets were not invented, but rather were found from a naturally occurring mineral called magnetite. Traditionally, the ancient Greeks were the discoverers of magnetite. There is a story about a shepherd named Magnes whose shoe nails stuck to a rock containing magnetite.
4) When a bar magnet is suspended freely, it always comes to rest in a north-south direction. This property is used in the construction of a mariner's compass. This is called as the directional property of a magnet.
5) 5 Uses of Magnets for Kids
• Compass. A compass uses a magnet to direct its needle to the north pole. ...
• Mag-Lev Trains. Magnetically levitated trains, known as mag-lev trains, use magnets under the cars to float above the magnetic tracks because the magnets are repelling each other. ...
• Vending Machines. ...
• Holding Things. ...
• Electric Motors.
6) They are attractive Property – Magnet attracts ferromagnetic materials like iron, cobalt, and nickel. Repulsive Properties – Like magnetic poles repel each other and unlike magnetic poles attract each other. Directive Property – A freely suspended magnet always points in a north-south direction.
7) For example, small horseshoes can collect paper clips while industrial-sized horseshoe magnets are used in construction and engineering to pick up large pieces of heavy metal. Horseshoe magnets are also used at the bottom of pendulums.
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