Question

current is flowing south to North then what will be direction of magnetic field when observed from North
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Answer 1

Answer:

North pole to South pole but current decrease

Answer 2

The field lines will be in concentric circles and appear in anticlockwise manner if viewed from north.

Explanation:

Here they are saying that the wire is a straight wire, running in the North-south direction.

This can be imagined as if the wire is the y-axis of the Cartesian plane, with the +ve direction being North, and the -ve direction being South.

Now, if it is a straight wire, then the current produces concentric field lines, according to Maxwell's Corkscrew rule.

and when these are observed from the +ve side of the y-axis (North of wire), then they seem to be going (moving) in the anticlockwise manner (direction).

Hope this answer helps.

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