The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
A)E.
B)F.
C)G.
D)H.
E)A.

Question

The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is 
A)E. 
B)F. 
C)G. 
D)H. 
E)A.

Quizplus · Accepted Answer

According to the right-hand rule, if the current is directed up out of the page, the magnetic field will be in a counterclockwise direction around the wire. Point P is located below the wire and to the left, so the direction of the magnetic field will be towards the right of the page, which corresponds to direction E.

The Diagram Below Shows the Position of a Long Straight