Conductors and Insulators
Conductors and Insulators
Conductors :
Conductors are materials or substances which allow electricity to flow through them. They conduct electricity because that have free electrons which can flow easily inside them from atom to atom. Also conductors allow the transmission of heat or light from one source to another.
Metals, humans, earth, animals are all conductors. The human body is a good conductor. So it provides a resistance- free path for the current to flow from wire to body. This is the reason we get electric shocks.
Conductors have free or valence electrons which allow current to pass through it easily.
Examples of conductors :
Insulators :
These are the materials or substances which do not allow electricity to pass through them. This happens because they do not have free electrons to flow form one atom to other. These materials also do not allow the conduction of heat or light through them.
Plastic, glass, wood are some of the examples of insulators. This is the reason why electric wires are coated with plastic coating. PVC coating do not allow the electric current to leak to the surroundings.
Examples :
|
S.No 1. 2 3 4 5 6 |
Conductors Silver Copper Aluminum Lead Tap water Gold |
Insulators Plastic Glass Bakelite Cotton Wood Cork |
S.No. 7 8 9 10 11 12 |
Conductors Human body Living plant Brass Tin Iron steel |
Insulators Silk Pure water Rubber Leather Ebonite Nylon |
Both conductors and insulators are important in using electricity. Whenever we want to make a circuit to use electric current in some way, for example, to light a bulb, run a fan, work an oven or run a washing machine,we use wires made of a metal, such as copper or aluminium, which are good conductors. However, we cannot use bare wires as this would be dangerous. A bare wire carrying current can give you an electric shock. Therefore, wires are always coated with an insulating material, such as plastic. You would also have noticed that the outer coverings of switches, regulators of fans, plugs, sockets, etc. are made of an insulating material, such as plastic or bakelite. This saves you from getting electric shocks.
Gases are good conductors of electricity at ____________________ | |||
| Right Option : B | |||
| View Explanation | |||
In a metal, | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following is not a conductor of electricity? | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [20]
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
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Barkha Arora
10thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
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Eshan Arora
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Cheshta
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Yogansh Nyasi
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10thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
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7thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
