11. Magnetic field at the centre O due to the given
structure is
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curve as long as and as big as center of circles
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Explanation:
so magnetic field due to the arc shown here will be = 3μ0I/8R
Magnetic field due to one of a straight conductor will be 0 and due to another is μ0i/4πR
Therefore total magnetis field at o will be
= 3μ0I/8R + μ0i/4πR
= μ0I/4R (3/2 + 1/π )
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