Two similar coils of radius R are lying ...

Two similar coils of radius `R` are lying concentriclaly with their planes at right angels to each other. The currents flowing in them are `I` and `2I` respectively. The resulant magntic field induction at the centre will be

`(sqrt(5mu_(0)I))/(2R)`

`(3mu_(0)I)/(2R)`

`(mu_(0)I)/(2R)`

`(mu_(0)i)/(R)`

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