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Two insulated circular loops A and B of radius 'a' carrying a current of 'I' in the anti clockwise direction as shown in the figure. The magnitude of the magnetic induction at the centre will be : [figure]
(2) 0 I 2a
Each loop at its centre: B= 0 I2a, along its own axis
the loops are in perpendicular planes, BA BB
[figure]
Bnet= BA2+BB2= 2 0 I2a= 0 I 2a
Answer: (2)
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