A) \[8.33\times {{10}^{-8}}\overset{\hat{\ }}{\mathop{k}}\,T\]
B) \[18.9\times {{10}^{-8}}\overset{\hat{\ }}{\mathop{k}}\,T\]
C) \[2.1\times {{10}^{-8}}\overset{\hat{\ }}{\mathop{k}}\,T\]
D) \[2.1\times {{10}^{8}}\overset{\hat{\ }}{\mathop{k}}\,T\]
Correct Answer: C
Solution :
\[c=\frac{E}{B}\] Magnetic field, \[B=\frac{E}{c}\] \[=\frac{6.3}{3\times {{10}^{8}}}\]
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