Q 97 ans is c . Why ?
Q.97. Two identical circular loops of metal wires are lying on a table without touching each other. Loop A carries a current which increases with time. In response the loop B
(a) remain stationary
(b) is attracted by loop A
(c) is repelled by loop A
(d) rotates about its centre of mass with CM fixed

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Solution

dear student
as in loop A current incerase with time . so the flux due to this cureent passing through loop B also increases with time
as per lenzes law induced current in B produces in such a way to oppose the increasing flux change
so it produced current in such a way that flux produced due to the induced crrent have direction opposite to them .
as dircion of manetic field due to both the loops aare opsite to each other so they repell each other

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B

L_{1}

L_{2}

L_{1}

L_{2}

Table 1	Table 2
(a) If current is increased	(p) Induced current in loop is clockwise
(b) If current is decreased	(q) Induced current in loop is anticlockwise
(c) If loop is moved away from the wire	(r) Wire will attract the loop
(d) If loop is moved towards the wire	(s) wire will repel the loop

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