When we change the direction of current in a conductor, the magnetic field line around it

increases

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changes its direction

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decreases

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remain same

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Solution

The correct option is B
changes its direction

According to oersted experiment, when current flows in a conductor a magnetic field is produced around it. When we change the direction of current in a conductor, the direction of magnetic field line around it also changes.

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When we change the direction of current in a conductor, the magnetic field line around it

The correct option is B changes its direction According to oersted experiment, when current flows in a conductor a magnetic field is produced around it. When we change the direction of current in a conductor, the direction of magnetic field line around it also changes.

The correct option is B
changes its direction

According to oersted experiment, when current flows in a conductor a magnetic field is produced around it. When we change the direction of current in a conductor, the direction of magnetic field line around it also changes.