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Download MS PS CC RWA Answer Key - Lucky Discovery 1. During
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CK12 MS PS RWA Answer Key Lucky Discovery MS PS CC RWA Answer Key - Lucky Discovery 1. During a lecture in 1820, Oersted carried out an experiment that had never been performed before. He placed a compass with a magnetized needle underneath a wire. Then he turned on electric current through the wire and observed that the needle of the compass moved. Oersted realized from this experiment that electricity and magnetism are connected. 2. The demonstration in the video shows what Oersted observed in his experiment. In the demonstration, a wire is placed above a magnetized needle. When both ends of the wire are connected to a battery so current flows through the wire, the magnetized needle moves. 3. Following his demonstration of a connection between electricity and magnetism, many other scientists began investigating electromagnetism. This research led to important new theories and discoveries. 4. Because they are controlled by electric current, which can be varied, electromagnets can be made to vary in the strength and direction of their magnetic force. They can also be made very strong and easily turned off or on. In addition, they can be used to create continual motion when opposed by other magnets. 5. Answers may vary. Sample answer: Loudspeakers make use of the ability of electromagnets to vary in magnetic force. Junkyard magnets make use of the ability of electromagnets to be very strong and easily turned off or on. Maglev trains make use of the ability of electromagnets to create continual motion. 6. Answers may vary. Sample answer: I think my life would be very different without Oersted’s discovery because many modern devices use electromagnets. For example, without electromagnets, there would be no electric motors, and electric motors are found in devices such as electric fans, hair dryers, computers, and microwave ovens. page 1