A) \[4\pi \times {{10}^{-5}}\,tesla\]
B) \[8\pi \times {{10}^{-5}}\,tesla\]
C) \[4\times {{10}^{-5}}\,tesla\]
D) \[2\times {{10}^{-5}}\,tesla\]
Correct Answer: A
Solution :
\[B=\frac{{{\mu }_{0}}Ni}{2r}=\frac{4\pi \times {{10}^{-7}}\times 100\times 0.1}{2\times 5\times {{10}^{-2}}}\] \[=4\pi \times {{10}^{-5}}\] Tesla
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