When I tried to do find direction of magnetic field at origin using Right hand thumb rule it gave direction of field as -j but when I applied Boit Savart Law i.e B=Idl * R it gives direction of field as +j....................Why this contradiction???????????

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Question

When I tried to do find direction of magnetic field at origin using Right hand thumb rule it gave direction of field as -j but when I applied Boit Savart Law i.e B=Idl * R it gives direction of field as +j....................Why this contradiction???????????

Plzzzzzzzzzzzzzzzzz help meeeeeeeeeeeeeeeeeeeeeeeeeeeeee

ROSHAN MUJEEB · Answer

please check your calculations once more both of them will give same direction as -j

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