A) \[3\times {{10}^{-7}}\Omega \]
B) \[3\times {{10}^{-9}}\Omega \]
C) \[3\times {{10}^{-5}}\Omega \]
D) \[3\times {{10}^{-3}}\Omega \]
Correct Answer: A
Solution :
Length \[l=1\text{ }cm={{10}^{-2}}m\] Area of cross-section \[A=1\text{ }cm\times 100\text{ }cm\] \[=100\,c{{m}^{2}}\] \[={{10}^{-2}}{{m}^{2}}\] Resistance, \[R=3\times {{10}^{-7}}\times \frac{{{10}^{-2}}}{{{10}^{-2}}}\] \[=3\times {{10}^{-7}}\Omega \]You need to login to perform this action.
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