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Question

A finite conducting wire is placed along the Y axis, and it carries current in +Y direction. The field at a point on +X axis will be towards .

A
+Y direction
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B
-Z direction
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C
+X direction
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Solution

The correct option is B -Z direction
Using right hand thumb rule, we can say 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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