JEE Main 2013 Physics question
Not in JEE Advanced syllabus
The earth's magnetic field lines resemble that of a dipole at the centre of the earth. If the magnetic moment of this dipole is close to , the value of earth's magnetic field near the equator is close to (radius of the earth m)
Answer: (4)
Solution
On the equatorial line, T. In gauss ( T) this is
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