A) \[1\Omega \]
B) \[2\Omega \]
C) \[5\Omega \]
D) \[8\Omega \]
Correct Answer: A
Solution :
[a] \[R=\rho \ell /A;R'=\frac{\rho \ell '}{A'}=\frac{\rho \left( \ell /2 \right)}{2A}=\frac{1}{4}R.\]
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