Question

A long, straight, vertical wire carries a current upward. Due east of this wire, in what direction does the magnetic field point? A long, straight, vertical wire carries a current upward. Due east of this wire, in what direction does the magnetic field point? west north upward east downward south

Answer 1

The magnetic field points northwards

Step-by-step explanation:

This is because a radial magnetic field is generated round the wire and its direction is always in the direction of the tangent to the circle at distance R from the wire. Due east of the wire, the tangent to the circle at radius, R points northwards. So, the direction of the magnetic field at that point is north.