When a current is passed through a circular coil, a magnetic field is produced around it. The lines of force are circular near the wire, but what happens to them towards the middle point of the coil?
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Answer: Either an electric current is passed through the wire of the coil to generate a magnetic field, or conversely an external time-varying magnetic field through the interior of the coil generates an EMF (voltage) in the conductor.
Explanation:
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