A moving electric current produces a magnetic field proportional to the amount of current flow. This magnetic field can be made stronger by winding the wire into a coil and further enhanced if done around an iron containing (ferrous) core.
Which of the following will increase the magnetic field produced by the electric current in a wire?
construct the wire from conductive material |
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wrap the wire around a ceramic core |
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construct the wire from insulative material |
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wind the wire into a coil |