A) zero
B) \[l{{\mu }_{0}}i/r\]
C) \[{{\mu }_{0}}i/4r\]
D) \[{{\mu }_{0}}i/r\]
Correct Answer: C
Solution :
The magnetic induction, \[{{B}_{o}}\] (due to only half circle) \[=\frac{1}{2}\,\,\frac{{{\mu }_{0}}i}{2r}=\frac{{{\mu }_{0}}i}{4r}\] [as induction (Net), due to straight part will be conceled by each other]
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