Electro Magnet
Electromagnet
It is magnet made by using electric current. An electromagnet works on the principal of magnetic effect of the current. Wrap a wire around a soft iron piece (known as the core). A magnet made using such an arrangement is called an electromagnet. A solenoid is a device which can be used as an electromagnet.
Construction of Solenoid :
It is made of a long wire that has been wound many times (usually around a hollow metallic core). It has the shape of a long cylinder.
The more the number of turns of wire around the core the more will be the magnetic effect. The iron nail attracts more number of safety pins when wrapped with a coil with more number of turns. If the current passing through the coil is switched off then the iron piece will lose its magnetic effect, i.e., it will stop behaving like a magnet such magnet are called temporary magnets because they behave as a magnet as long as electricity flows through them.
The core of an electromagnet is made up of ___________________? | |||
| Right Option : A | |||
| View Explanation | |||
An electromagnet works on the principle of _____________effect of current. | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following are correct : (a) An electromagnet is a solenoid coil that gets magnetised i.e. becomes a magnet due to flow of current. (b) An electromagnet works on the principle of magnetic effect of the current. (c) There are two factors through which an electromagnet can be made stronger are by increasing the amount of current used in the coil and by increasing the number of turns forming the coil. | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
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Cheshta
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Barkha Arora
10thAbhyas 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.
Manish Kumar
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Eshan Arora
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10thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
