A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip pointing down at $22^o$ 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 (in $G$) at the place
A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip pointing down at $22^o$ 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 (in $G$) at the place
- A
$0.38$
- B
$0.74$
- C
$1.26$
- D
$1.52$
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