A) \[\sqrt{2}\times {{10}^{-7}}\,tesla\]
B) \[\sqrt{5}\times {{10}^{-7}}\,tesla\]
C) \[\sqrt{2}\times {{10}^{-3}}\,tesla\]
D) \[\sqrt{5}\times {{10}^{-3}}\,tesla\]
Correct Answer: D
Solution :
From figure \[{{B}_{net}}=\sqrt{B_{a}^{2}+B_{e}^{2}}\] \[=\sqrt{{{\left( \frac{{{\mu }_{0}}}{4\pi }.\frac{2M}{{{d}^{3}}} \right)}^{2}}+{{\left( \frac{{{\mu }_{0}}}{4\pi }.\frac{M}{{{d}^{3}}} \right)}^{2}}}\] \[=\sqrt{5}.\frac{{{\mu }_{0}}}{4\pi }.\frac{M}{{{d}^{3}}}=\sqrt{5}\times {{10}^{-7}}\times \frac{10}{{{(0.1)}^{3}}}=\sqrt{5}\times {{10}^{-3}}tesla\]You need to login to perform this action.
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