Magnetic Field of a Current Loop: A current-carrying loop of wire lies flat on a horizontal tabletop. When viewed from above, the current moves around the loop in a counterclockwise sense. For points on the tabletop inside the loop, the magnetic field lines caused by this current
A. circle the loop in a clockwise direction.
B. circle the loop in a counterclockwise direction.
C. point straight up.
D. point straight down.
Answer: C
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