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Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The currents flowing in them are

Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The currents flowing in them are I and 2 I, respectively. The resultant magnetic field induction at the centre will be: (a) (b) 2R Hol (c) 5,I 2R 3l (d) Hol R

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