A wire in the form of a tightly wound so...

A wire in the form of a tightly wound solenoid is connected to a DC source, and carries a current. If the coil is stretched so that there are gaps between successive elements of the spiral coil, will the current increase or decrease? Explain.

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The current will increase because when the coil is stretched, the magnetic flux leaks through the gaps and according to Lenz.s law induced emf resist this decrease. Thus there will be an increase in current

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