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An infinitely long straight conductor is bent into the shape as shown below. It carries a current of i Amps, and the circular loop is R meters. Then the magnitude of magnetic induction at the center of the circular loop is :


$(1)\; \frac{\mu_o i}{2 \pi R} \\(2)\;\frac{\mu_o n i}{2  R} \\ (3)\; \frac{\mu_o i}{2 \pi R}(\pi +1) \\(4)\; \frac{\mu_o i}{2 \pi R}(\pi-1)$
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$(3)\; \frac{\mu_o i}{2 \pi R}(\pi +1)$
answered Nov 7, 2013 by pady_1

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