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Question

A small circular loop is suspended from a insulating thread. Another co-axial 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 :

215054_cf98162e3e984f5d968d1e3556e68552.png


A
be attracted towards the bigger loop
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B
be repelled by the bigger loop
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C
experience no force
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D
show all of the above
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Solution

The correct option is A be repelled by the bigger loop
Lenz's Law
If an induced current flows, its direction is always such that it will oppose the change which produced it.
So, when the first loop is moved towards the smaller loop it will face repulsion.
(i.e. opposition to the change being caused)

Physics

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