Is it true that a soft iron core increases the strength of the electromagnets?

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True

False

answer is A.

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Detailed Solution

The above statement is True.
A solenoid is a temporary magnet which has helical coils in it. They are connected to the cell, so the coil acts as a magnet when an electric current passes through it. In contrast, an electromagnet has an iron core along which helical coils are wrapped, and when current is passed through the coils, it also starts acting like a magnet. Solenoids and electromagnets are both known as temporary magnets because they act as magnets until the current flow through the coils of the solenoid or electromagnet. After that, they behave normally.

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