A circular loop placed in uniform B is transformed into elliptical loop as shown in fig. Direction of induced current if any during transformation will be:
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a
Clockwise
b
Anticlockwise
c
No induced current
d
First clockwise, then anticlockwise
answer is A.
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Detailed Solution
ϕ=BA→for a given length of wire maximum area is enclosed by circle. So A decreases, thus B should be increased. So CW current will be induced in loop.