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Two insulated circular loop 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: B O A

1. a I 2 0 μ
2. a 2 I 0 μ
3. a 2 I 0 μ
4. a I 2 0 μ

Correct answer: a 2 I 0 μ

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