Use of Electro Magnet Electric bell
Use of Electromagnet Electric bell
Electromagnet
It is a magnet made by using electric current. An electromagnet works on the magnetic effect of current.
Use of electromagnet:
Electric Bell:
An electric bell has an electromagnet that pulls a strip of iron which makes the hammer hit the gong to ring the bell.
Construction :
The electric bell has a U shaped electromagnet. There is a small iron bar called armature which is held in front of the poles of the electromagnet.The lower end of iron bar is attached to a flat spring and the flat spring is itself fixed to a metal bracket. The upper end of iron bar has a clapper attach to it. A metal gong is fixed near the clapper.
Working :
Step 1 . When you push the switch of the bell, an electric current flows through the electromagnet.
Step 2 . The electromagnet attracts the soft iron strip. The hammer attached to the strip then hits the gong, making it ring.
Which of the following are correct ? (a) Electromagnets are used in cranes to pick up cars in scrap yard and also to separate iron from garbage dump. (b) An electric bell has an electromagnet that pulls a strip of iron which makes the hammer hit the gong to ring the bell. | |||
| Right Option : C | |||
| View Explanation | |||
In electric bell which effect of current is used? | |||
| Right Option : C | |||
| View Explanation | |||
The electric bell has a ____________________ shaped electromagnet . | |||
| Right Option : B | |||
| View Explanation | |||
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