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Q.

Name the material which can be used to make an electromagnet.


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a

Soft iron

b

Steel

c

Both 1 and 2

d

None of these 

answer is A.

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Detailed Solution

To make an electromagnet, we insert a bar of soft iron inside the core of a solenoid.
The electromagnet is made when we pass the current through the solenoid coil, the inserted soft iron acts as a magnet. And when we stop the supply of current through the solenoid coil, it acts as a normal iron bar. So, we use the soft iron bar to make an electromagnet.
 
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Name the material which can be used to make an electromagnet.