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A compass needle, free to turn in a vert...

A compass needle, free to turn in a vertical plane orients itself with its axis vertical at a certain place on the earth. Find out the values of (i) Horizontal component of earth's magnetic field and (ii) angle of dip at that place.

Text Solution

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(i) At the given place total earth's magnetic field B is along the vertical diretion. Therefore, the horizontal component of earth's magnetic field
`B_H=B cos 90^@=0`.
(ii) Angle of dip at that place=angle between the axis of needle with the horizontal line in magnetic meridian`=90^@`.
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