NCERT Class XII Chapter
Magnetism and Matter
Questions With Solutions
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Question : 10
Total: 25
A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip pointing down at 22° with the horizontal. The horizontal component of the earth’s magnetic field at the place is known to be 0.35 G. Determine the magnitude of the earth’s magnetic field at the place.
Solution:
North tip is pointing down at 22° with horizontal,
hence the location is in northern hemisphere.
So, angle of dip δ = 22° and
B =
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