Per15_exercise - a) The north pole of a magnet attracts...

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Solutions to Period 15 Exercises E.1 If an electric current is passed through a wire, a magnetic field exists around the wire a) only if the wire is made of copper. b) only if the wire is made of steel. c) only if the wire is made of aluminum. d) only if the wire is made of brass e) regardless of the nature of the conductor. E.1 = e E.2 Which of the following could be used to detect a magnetic field in some region of space? a) Drop iron filings on a plate of glass in this region of space. b) Use a compass. c) Both of the above. d) None of the above. E.2 = c 15-Ex 1&2
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E.3 The magnetic field around a coil of copper wire carrying a current can be increased by a) decreasing the number of loops (turns) in the coil. b) placing a plastic rod in the coil. c) increasing the current in the coil. d) placing a wad of cat fur in the coil. e) all of the above E.3 = c E.4 Which of the following statements are TRUE?
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Unformatted text preview: a) The north pole of a magnet attracts another magnet's south pole. b) The south pole of a magnet attracts another magnet's north pole. c) The north pole of a magnet points near the Earths geographic North pole. d) The north pole of a magnet points at the Earths magnetic south pole. e) All of the above statements are TRUE. E.5 = e 15-Ex 3&4 E.5 If a magnet is broken in half a) it doesn't work any more. b) one half is only north pole and the other is only south pole. c) a spark is produced. d) it becomes two smaller magnets, each with its own north and south pole. e) it must be remagnetized before it will act like a magnet. E.5 = d 15-Ex 5 Solutions to Period 15 Exercises E.1 = e E.2 = c E.3 = c E.4 = e E.5 = d 15-Ans...
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This note was uploaded on 06/11/2011 for the course PHYSICS 103 taught by Professor Staff during the Spring '10 term at Ohio State.

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Per15_exercise - a) The north pole of a magnet attracts...

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