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Two identical coils having same number o...

Two identical coils having same number of turns and carrying equal current have common centre and their planes are at right angles to each other. What is the ratio of magnitude of the resultant magnetic field at the centre and magnetic field due to one of the coils at the centre ?

A

`sqrt2 : 1`

B

`1: sqrt2`

C

`2:1`

D

`1:1`

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