For a stronger current, a /an ___________ (permanent/electromagnet) is used.

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Solution

Electromagnet:
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.
Electromagnet loses its magnetism when switched off the current.
Thus, the electromagnet is a temporary magnet.
It can be made into a more powerful magnet by increasing the strength of the current in the circuit.
Hence, For a stronger current, an electromagnet is used.

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