An east-facing loop carries a counterclockwise current as viewed from the east. Suppose we place this loop in a uniform magnetic field pointing vertically upward. The loop is free to rotate around any axis. How will the loop respond to the magnetic field?
A. When viewed from above, the loop will twist 90° clockwise to face south.
B. When viewed from above, the loop will twist 90° counterclockwise to face north.
C. When viewed from the south, the loop will twist 90° clockwise to face downward.
D. When viewed from the south, the loop will twist 90° counterclockwise to face upward.
E. The loop is not affected by the field.
D. When viewed from the south, the loop will twist 90° counterclockwise to face upward.
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