A) \[\text{0}\text{.102}\]
B) \[\text{0}\text{.51 eV}\]
C) \[\text{20 eV}\]
D) \[\text{1020 eV}\]
Correct Answer: A
Solution :
The angle of dip at a place is the angle between the direction of earth?s magnetic field and the horizontal in the magnetic meridian at that place. The earth?s magnetic field \[{{B}_{e}}\] may be resolved into two components. \[H={{B}_{e}}\,\cos \,\,\theta \] \[V={{B}_{e}}\,\sin \,\,\theta \] Given, \[\theta ={{60}^{\circ }},\,{{B}_{e}}=0.36\,G.\] \[H=0.36\,\,\cos \,\,{{60}^{\circ }}=0.36\times \frac{1}{2}=0.18\,\,gauss\] \[V=0.36\,\,\cos \,\,{{60}^{\circ }}=0.36\times \frac{\sqrt{3}}{2}=0.18\,\sqrt{3}\,gauss\]Note : The angle of dip changes not only from place, but also at the same place from time to time irregularly.
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