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.
A substance consisting of a coil wire with an iron core and is only magnetized when an electric current flows through it is called __________________.
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| Right Option : B | |||
| View Explanation | |||
The core of an elctromagnet is made of _____. | |||
| Right Option : A | |||
| View Explanation |
Which of the following statements is not true about an electromagnet ? | |||
| Right Option : C | |||
| 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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Ayan Ghosh
8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thI 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
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
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8thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
