A current i flows through an infinitely long wire having infinite bands as shown. The rad ius of the first curved section is a and the radii of the successive curved portions each increases by a factor eta . Find magnetic field at O.

A current i flows through an infinitely long wire having infinite band

1.	A current i flows through an infinitely long wire having infinite bands as shown. The rad ius of the first curved section is a and the radii of the successive curved portions each increases by a factor eta . Find magnetic field at O.
Answer» Solution :`B = ((mu_0 itheta)/(2 PIA))/(1 + 1/eta)=(mu_0 itheta eta)/(4 PI a(eta+ 1))`

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A current i flows through an infinitely long wire having infinite bands as shown. The rad ius of the first curved section is a and the radii of the successive curved portions each increases by a factor eta . Find magnetic field at O.

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