Two concentric circular coils x and y of...

Two concentric circular coils x and y of radius 16 cm and 10 cm respectively, lie in the same vertical plane containing the north to south direction coil x has 20 turns and carries current of 16A coil y has 25 turns and carries a current of 18A! The sense of the current in x is anticlockwise and clockwise in y for an observe looking at the coils facing west. Give The magnitude and direction of net magnetic field due to the coils at the centre.

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