Q. Find out the magnetic field at the point O due to the flow of electric current i in the wire having straight and semi-circular portions, as shown. Share with your friends Share 4 Shobhit Mittal answered this Dear Studentthe field cancel because the field by the upper wire is in downward direction and due to lower wire is in upward direction of same magnitude at the center of the circle O.to find the direction use right hand thumb rule,since the field are in opposite direction and equal in magnitude they will cancel each other .hence the field at the O is due to semi circular wire.Regards -4 View Full Answer
