How To Find Magnetic Field At The Centre Of The Circular Arcs

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Question

A closed current path is made from two different circular arcs as shown in the figure. The larger arc has radius 3 cm and covers one quarter of the circle, and the smaller arc has radius 1 cm and overs the remaining three quarters of the circle. I the current is 1.5 A going counter clockwise, what is the magnetic field at the centre of the circular arcs?

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