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Two concentric coils each of radius equal to 2π cm are placed at right angles to each other. 3 ampere and 4 ampere are the currents flowing in each coil respectively.
The magnetic induction in weber/m²at their common centre is
$(μ_{0} = 4 π \times 10^{- 7} wb / A - m))$

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5 x 10^–5

10^–5

12 x 10^–5

7 x 10^–5

answer is A.

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Detailed Solution

$B = \sqrt{B_{1}^{2} + B_{2}^{2}}; B_{1} = \frac{μ_{0} i_{1}}{2 r_{1}}, B_{2} = \frac{μ_{0} i_{2}}{2 r_{2}}$

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