An insulated copper wire is wound around a steel nail and current is passed for some time. The nail will change to a:

permanent magnet

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temporary magnet

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will not get magnetised

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none of the above

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Solution

The correct option is C temporary magnet
The current carrying wire induces a temporary magnetic field around the wire. This induced magnetic field attracts the steel nail and turns it into a temporary magnet too.

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An insulated copper wire is wound around a steel nail and current is passed for some time. The nail will change to a:

The correct option is C temporary magnetThe current carrying wire induces a temporary magnetic field around the wire. This induced magnetic field attracts the steel nail and turns it into a temporary magnet too.

The correct option is C temporary magnet
The current carrying wire induces a temporary magnetic field around the wire. This induced magnetic field attracts the steel nail and turns it into a temporary magnet too.