A lab group has been tasked with conducting an experiment to see if the electric current flowing through a wire has any effect on a magnetic compass. The group sets up a straight length of wire on the surface of their lab bench and then connects the two ends to a battery to get current to flow through the wire. Next, the group sets the compass flat on the table at three different points, as seen in the diagram below:

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Bar Magnet

In physics, magnetism is a phenomenon exhibited by a magnetic substance that exerts either attractive or repulsive force. A bar magnet is either a rectangular or round and hollow fit comprised of ferromagnetic materials and has a fanciful attractive field surrounded by it.