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)A.
B)B.
C)C.
D)D.
E)E.

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)A. 
B)B. 
C)C. 
D)D. 
E)E.

Quizplus · Accepted Answer

By applying the right-hand rule, we can see that the magnetic field at point P is directed towards the right, which corresponds to direction C on the diagram.

The Diagram Below Shows the Position of a Long Straight