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  4. A small circular loop is suspended from an insulating thread. Another coaxial circular loop carrying a current I and having radius much larger than the first loop starts moving towards the smaller loop. The smaller loop will: <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-trowpwk7f8opt4xs.jpg />

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Q. A small circular loop is suspended from an insulating thread. Another coaxial circular loop carrying a current I and having radius much larger than the first loop starts moving towards the smaller loop. The smaller loop will :
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NTA AbhyasNTA Abhyas 2020

Solution:

By Lenz's law, induced effects always oppose the cause of induction. So when the first loop is moves towards the smaller loop it will be repelled by the induced current in the loop.