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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

A

No change in current

B

current will increase

C

Current will decrease

D

Flux through the coil will increase.

Text Solution

Verified by Experts

The correct Answer is:
B
When the successive elements so that there are gaps between successive elements of the spiral coil i.e., the wires are pulled apart which lead to the flux leak through the gaps according to Lenz's law, the emf produced must oppose this decrease, which can be done by increase in current. So, the current will increases.
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