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Find the magnetic field at centre P due ...

Find the magnetic field at centre P due to current i in the conductor as shown in fig.

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`B_(1)=(mu_(0))/(4pi),i/r odot,`
`B_(2)=3/4(mu_(0)i)/(2r)odot`
`B_(3)=0` `bar(B_(p))=bar(B_(I))+bar(B_(II))+bar(B_(III))`
`bar(B_(p))=(mu_(0))/(4pi)i/r+(3mu_(0)i)/(8r)odot,bar(B_(p))=(mu_(0))/(4r)[1/(pi)+3/2]odot`
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