If a current is passed through a spring then the spring will (a) expand (b) compress (c) remain same (d) none of these

Answer: (b). Adjacent turns of the spring carry current in the same direction. Parallel currents in the same direction attract, so the turns pull towards each other. So the answer is (b) compress.

If a current is passed through a spring then the spring will | JEE Main 2002 (AIEEE)

Q68JEE Main 2002 · AIEEEEasy

Force on Current-Carrying Conductors

If a current is passed through a spring then the spring will

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Answer: (b)

Adjacent turns of the spring carry current in the same direction.
Parallel currents in the same direction attract, so the turns pull towards each other.
So the answer is (b) compress.

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Force on Current-Carrying Conductors question from JEE Main 2002 (AIEEE)

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