A) \[20\Omega \]
B) \[5.4\Omega \]
C) \[12\Omega \]
D) \[4.5\Omega \]
Correct Answer: D
Solution :
[d] The equivalent circuit is shown in figure. \[R=\frac{6\times 4}{6+4}+\frac{7\times 3}{7+3}=4.5\Omega \]
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