Why does a magnetic needle show a deflection when brought close to a current carrying conductor?

Because the current carrying coil produces magnetic field around it.

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Because the current carrying coil produces electric field around it.

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Because electric field of the current carrying conductor exerts force on it

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Because of the air between current carrying conductor and magnetic needle.

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Solution

The correct option is A Because the current carrying coil produces magnetic field around it.
A current carrying conductor produces a magnetic field around it. This magnetic field apply force on the magnetic needle of compass, and thus the needle shows deflection.

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