A compass needle normally points toward Earth’s magnetic pole, which is near the North Pole. Which best explains why the needle moves away from the pole when it comes close to a current-carrying wire?
Answer
A
Current within the wire weakens the magnetic force of the pole.
B
Magnetism surrounding the wire weakens the magnetic force of the pole.
C
Current within the wire draws the needle toward the wire.
D
Magnetism surrounding the wire draws the needle toward the wire.