An electric current flows in a wire from east to west- What will be the direction of the magnetic field due to this wire at a point north of the wire? South of the wire?

Options

A. `1/2 [(IBI)/(m ) -2g]t^2`
B. `1/2 [(IBI )/(m ) xx (1)/( cos theta ) - 2 g sin theta ]t^2`
C. `1/2 [ (IBI)/(m )- 2 g sin theta ]t^2`
D. `1/2 [(IBI )/(m ) ( cos 2 theta )/( cos theta )-2 g sin theta ] t^2`

Answer

D