A) \[5\times {{10}^{-5}}T\]
B) \[3\times {{10}^{-5}}T\]
C) \[1.25\times {{10}^{-4}}T\]
D) \[0.5\times {{10}^{-5}}T\]
Correct Answer: C
Solution :
\[B=\frac{{{\mu }_{0}}\times 4}{2a}\] \[{{\mu }_{0}}=4\pi \times {{10}^{-7}}Wb/Am\] \[B=\frac{4\pi \times {{10}^{-7}}}{2}\times \frac{50\times 2}{0.5}\] \[=1.25\times {{10}^{-4}}T\]
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