Why does the needle of a magnetic compass deflect when it is kept beside a current carrying wire?

Due to the magnetic effect of current

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Due to the heating effect of electric current

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Due to the chemical effect of electric current

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All of the above

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Solution

The correct option is A
Due to the magnetic effect of current

A current carrying wire always produces a magnetic field around it and due to this magnetic field the needle of magnetic compass deflects.

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