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Q.

[1]

Is it true that a soft iron core should be put inside a current-carrying solenoid to make an electromagnet?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
To generate an electromagnet, a soft iron core is placed inside a solenoid. When a soft iron core is placed inside a solenoid, the magnetic field strength increases dramatically because the iron core is magnetized by induction. An electromagnet is a combination of a solenoid and a soft iron core.
 
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