A) \[\frac{{{L}_{1}}{{L}_{2}}}{{{L}_{1}}+{{L}_{2}}}\]
B) \[({{L}_{1}}+{{L}_{2}})\]
C) \[({{L}_{1}}+{{L}_{2}})\,\frac{{{L}_{1}}}{{{L}_{2}}}\]
D) \[({{L}_{1}}+{{L}_{2}})\,\frac{{{L}_{2}}}{{{L}_{1}}}\]
Correct Answer: A
Solution :
[a] Parallel \[=\frac{{{L}_{1}}{{L}_{2}}}{{{L}_{1}}\times {{L}_{2}}}\]
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