A) \[7\times {{10}^{-5}}T\]
B) \[6\times {{10}^{-5}}T\]
C) \[5\times {{10}^{-5}}T\]
D) \[{{10}^{-4}}T\]
E) \[4\times {{10}^{-5}}\,T\]
Correct Answer: D
Solution :
Given: \[\tan {{37}^{o}}=\frac{3}{4}\] The vertical component of the earths magnetic field \[{{B}_{V}}=6\times {{10}^{-5}}T\] \[\sin {{37}^{o}}=\frac{3}{5}\] For vertical component \[{{B}_{V}}=B\sin \theta \] Or \[B=\frac{{{B}_{V}}}{\sin \theta }\] Or \[B=\frac{6\times {{10}^{-5}}}{3}\times 5\] Or \[B=10\times {{10}^{-5}}\] Or \[B={{10}^{-4}}T\]
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