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Magnetic Field Due to Finite Wire

A finite wire...

Question

A finite wire carrying current is placed along the Y axis and carries current in +Y direction. At any random point lying in the XY plane and 1st quadrant of assumed cartesian system, the field will point toward?

A

-Z direction

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B

+Y direction

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C

-X direction

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D

+Z direction

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Solution

The correct option is A -Z direction
The contribution due to each element of the wire will be in the -Z direction. Now counting all the contributions it will simply add up and the net field will also point in -Z direction.

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