The compass needle is in a counter-clockwise rotation.
Using the right-hand rule, the thumb is in the direction of the current and the fingers are curled in the line passing through the thumb. The fingers give the magnetic field direction.
A long, straight wire extends into and out of the screen. The current in the wire is
a) Out of the screen.
b) There is no current in the wire.
c) Into the screen.
d) There is not enough information to tell the direction.
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What scientific concept do you need to know in order to solve this problem?
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