| Directions : (1-5) |
| Element of the Earths Magnetic field |
| The earth's magnetic field at a point on its suface is usually characterised by three quantities : [a] declination [b] inclination or dip and [c] horizontal component of the field. These are knwon as the elements of the earth's magnetic field. At a place, angle between geographic meridian and magnetic meridian is defined as magnetic declination, whereas angle made by the earth's magnetic field with the horizontal in magnetic meridian is known as magnetic dip. |
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A) zero
B) \[\pi /3\]
C) \[\pi /2\]
D) \[\pi /6\]
Correct Answer: B
Solution :
\[\tan \theta =\frac{{{B}_{V}}}{{{B}_{H}}}\] and \[{{B}_{H}}=\frac{{{B}_{V}}}{\sqrt{3}}\] \[\therefore \,\,\,\tan \,\,\,\theta =\sqrt{3}\] i.e. \[\theta =\frac{\pi }{3}\]
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