SAT Subject Physics Practice Question 335: Answer and Explanation
A wire within a magnetic field has a current flowing in it as shown. Any force exerted on the wire is in the direction of
A. point A.
B. point B.
C. point C.
D. point D.
E. No forces are exerted on the wire.
Correct Answer: C
The correct answer is (C). Use the right-hand rule to find the correct answer. Point your fingers in the direction of the magnetic field lines (toward the south pole), and point your thumb along the wave in the direction of the current flow. Your palm points down toward letter C.