A) \[{{10}^{-4}}T\]
B) \[{{10}^{-5}}T\]
C) \[{{10}^{-6}}T\]
D) None of these
Correct Answer: C
Solution :
It has been established that earths magnetic field is fairly uniform. The strength of this field at the surface of earth is approximately \[{{10}^{-4}}\] tesla or 1 gauss. The field is not confined only to earths surface. It extends upto a height nearly 5 times the radius of earth.
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