A) \[\frac{{{\mu }_{0}}i}{4}\left[ \frac{1}{{{r}_{1}}}-\frac{1}{{{r}_{2}}} \right]\]
B) \[\frac{{{\mu }_{0}}i}{4}\left[ \frac{1}{{{r}_{1}}}+\frac{1}{{{r}_{2}}} \right]\]
C) \[\frac{{{\mu }_{0}}i}{2}\left[ \frac{1}{{{r}_{1}}}-\frac{1}{{{r}_{2}}} \right]\]
D) \[\frac{{{\mu }_{0}}i}{2}\left[ \frac{1}{{{r}_{1}}}+\frac{1}{{{r}_{2}}} \right]\]
Correct Answer: A
Solution :
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