The magnetic compass is not useful for navigation near the magnetic po

1.	The magnetic compass is not useful for navigation near the magnetic poles. Since
A.	\[R=0\]
B.	\[V=0\]
C.	\[H=0\]
D.	\[\theta ={{0}^{{}^\circ }}\]
Answer» D. \[\theta ={{0}^{{}^\circ }}\]

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