Two circular loops of equal radii are placed coaxially at some separation. The first is cut and a battery is inserted to drive a current in it. The current changes slightly because of the variation in resistance with temperature (produced$$ due to current in the $$circuit). During this period, the two loops.

Question

Two circular loops of equal radii are placed coaxially at some separation.  The first is cut and a battery is inserted to drive a current in it.  The current changes slightly because of the variation in resistance with temperature (produced$$ due to current in the $$circuit).  During this period, the two loops.

Infinity Learn · Accepted Answer

When current starts flowing in a loop heat is generated in the resistance which increases the resistivity of the resistance $$R=$$ρlA .   Thus the resistance of the circuit increases.  This will reduce the current in that loop.  Thus from lenz law the flux passing through the other loop decreases and hence a current in same direction (as$$ in loop $$1) is produced.  Thus they both attract each other.

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