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if current is passed through spring then spring will ? (A)expand (B) compress (C)remain same (D)non of these Please,also mention reason behind it.
@ pranav when a current will pass through the spring the magnetic filed will produce since the current pass in same direction in all coil of spring , the magnetic field wil have same direction all coils . this causes the spring to reduce its length , so, compress ( option 2 ) turns out to be the correct answer . HOPE IT CLEARS ..
option B is correct. Because we can treat spring as solenoid and when current passes through solenoid Magnetic field is produced on the axis of solenoid B = (μNi)/L .•. B is inversely proportional to Current .Hence when current is passed through coil the magnetic field is produced hence length is reduced I hope it clears concept
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