A) 20\[\Omega \]
B) 80\[\Omega \]
C) 10\[\Omega \]
D) 40\[\Omega \]
Correct Answer: A
Solution :
For\[\frac{{{R}_{1}}}{{{R}_{2}}}=\frac{{{L}_{1}}}{{{L}_{2}}}\] \[\Rightarrow \] \[{{R}_{1}}=\frac{{{L}_{1}}}{{{L}_{2}}}\times {{R}_{2}}=\frac{20}{80}\times 80=20\,\Omega \]
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