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[u=47x10- Him] 1) 0.1 2) 1.0 3) 10 4) 10...

[u=47x10- Him] 1) 0.1 2) 1.0 3) 10 4) 100 d B have radii 25. Two concentric circular coils A and B have 25 cm and 15 cm and carry currents 10A and 1 respectively. A has 24 turns and B has 18 turne direction of currents are in opposite order magnetic induction at the common centre of the is 1) 120u.T 3) 80u. T 2) 480u,T 4) 420 u.T

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