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

A wire in the form of a tightly would 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, then

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The current drawn form d.c. source will increase. This is because when the coil is stretched and air gaps are created between successive elements of the spiral coil, magnetic flux will leak through the gaps. According to Lenz's law, emf induced must resist the decrease in flux. This can be doen when more currents is drawn from d.c. source.
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