A current is flowing north along a power line. The direction of magnetic field above it, neglecting

Question

A current is flowing north along  a power line. The direction of magnetic field above it, neglecting the earth's field is\

Professor PC Thomas Classes · Answer

Apply right hand rule. The field will be towards the east. Rule : Hold the conductor in the right hand with the thumb pointing the current. Then the direction in which the other fingers point gives the direction of the field\