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Q.

Two identical coaxial circular loops carry a current I each, circulating in the same direction. If the loops-approach each other; you will observe that :

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a

the current in each increases

b

the current in each decreases

c

the current in each remains the same

d

the current in one increases whereas that in the other decreases

answer is B.

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Detailed Solution

Each loop tries to decrease current according to lenz law so as to resist the change in flux due to motion of the other loop towards it.

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