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List two methods of producing magnetic fields.

Two methods for producing magnetic fields are:

  1. We can create a magnetic field using a permanent magnet, which may be visualised by distributing iron filings on white paper and placing a magnet beneath the paper.

2. A magnetic field is created by a current-carrying straight wire.

3. To detect the presence of a magnetic field, various conductors such as solenoids and circular loops can be utilised.