Physics · 2014
JEE Main · 9 April 2014, Shift 1 · Q20
The magnetic field of earth at the equator is approximately 4 × 10^-5 T. The radius of earth is 6.4 × 10^6 m. Then the dipole moment of the earth…
The magnetic field of earth at the equator is approximately $\displaystyle 4 \times 10^{-5} \mathrm{~T}$. The radius of earth is $\displaystyle 6.4 \times 10^6 \mathrm{~m}$. Then the dipole moment of the earth will be nearly of the order of :
Official answer
(1)
$\displaystyle 10^{23} \mathrm{~A} \mathrm{~m}^2$
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JEE Main 2014 Physics question, with the answer from NTA’s final answer key. Where our answers come from.