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Force produced by a magnet

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http://img156.imageshack.us/img156/58/0006q.jpg (picture and question from Living Science 2A) Switch on the power supply.Observe the motion of the copper rod. a)What happens to the copper rod? b)What does this experiment show?

最佳解答:

(a) The copper rod moves towards the left. (b) It shows the interaction between a current carrying wire (coonductor) and a magnetic field in producing a force. The directions of the force, current and magnetic field are related by Fleming's left hand rule.

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