A) 250
B) 150
C) 125
D) 72
Correct Answer: A
Solution :
\[B=\frac{{{\mu }_{0}}NI{{R}^{2}}}{2{{({{x}^{2}}+{{R}^{2}})}^{3/2}}}\,\,=\,\,\frac{{{\mu }_{0}}NI{{(3)}^{2}}\times {{10}^{-4}}}{2{{(5)}^{3}}\times {{10}^{-6}}}\,\,=\,\,54\mu T\] \[{{B}_{centre}}\,\,=\,\,\frac{{{\mu }_{0}}NI}{2R}\,\,=\,\,\frac{{{\mu }_{0}}NI}{2\times 3\times {{10}^{-2}}}\]You need to login to perform this action.
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