A) \[\frac{{{\mu }_{0}}}{2\pi d}\left( \frac{{{l}_{1}}}{{{l}_{2}}} \right)\]
B) \[\frac{{{\mu }_{0}}}{2\pi d}({{l}_{1}}+{{l}_{2}})\]
C) \[\frac{{{\mu }_{0}}}{2\pi d}(l_{1}^{2}+l_{2}^{2})\]
D) \[\frac{{{\mu }_{0}}}{2\pi d}{{(l_{1}^{2}+l_{2}^{2})}^{1/2}}\]
Correct Answer: D
Solution :
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