A) About 1.2
B) About 2.4
C) About 3.6
D) About 4.8
Correct Answer: B
Solution :
\[\frac{{{r}_{\text{iron}}}}{{{r}_{\text{Copper}}}}=\sqrt{\frac{{{\rho }_{\text{iron}}}}{{{\rho }_{\text{copper}}}}}=\sqrt{\frac{1\times {{10}^{-7}}}{1.7\times {{10}^{-8}}}}\approx 2.4\].You need to login to perform this action.
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