A) \[{{10}^{23}}A{{m}^{2}}\]
B) \[{{10}^{20}}A{{m}^{2}}\]
C) \[{{10}^{16}}A{{m}^{2}}\]
D) \[{{10}^{10}}A{{m}^{2}}\]
Correct Answer: A
Solution :
Given, \[B=4\times {{10}^{-5}}T\] |
\[{{R}_{E}}=6.4\times {{10}^{6}}m\] |
Dipole moment of the earth M = ? |
\[B=\frac{{{\mu }_{0}}}{4\pi }\frac{M}{{{d}^{3}}}\] |
\[4\times {{10}^{-5}}=\frac{4\pi \times {{10}^{-7}}\times M}{4\pi \times {{\left( 6.4\times {{10}^{6}} \right)}^{3}}}\] |
\[\therefore \]\[M\cong {{10}^{23}}A{{m}^{2}}\] |
You need to login to perform this action.
You will be redirected in
3 sec