A) 1.2 ´ 10?4 T
B) 2.4 ´ 10?4 T
C) 2.4 ´ 104 T
D) 1.2 ´ 104 T
Correct Answer: B
Solution :
\[B=\frac{{{\mu }_{0}}}{4\pi }.\frac{2M}{{{d}^{3}}}\Rightarrow B={{10}^{-7}}\times \frac{2\times 1.2}{{{\left( 0.1 \right)}^{3}}}=2.4\times {{10}^{-4}}T\]
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