A) \[2.0\times {{10}^{-3}}\text{m}\]
B) \[2.0\times {{10}^{-4}}\text{m}\]
C) \[1.5\times {{10}^{-3}}\text{m}\]
D) \[12.5\times {{10}^{-4}}\text{m}\]
Correct Answer: A
Solution :
\[W=T.\,2\pi r\] \[r=\frac{W}{2\pi T}=\frac{6.28\times {{10}^{-4}}}{2\times 3.14\times 5\times {{10}^{-2}}}\] \[=2\times {{10}^{-3}}m\]You need to login to perform this action.
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