the needle of dip circle is the vertical at the magnetic poles.the dip circle is rotated about vertical axis through 90.what will be the position of the needle in the vertical circular scale?

When dip circle is rotated about at angle 90 degree that means dip circle is along the equatro so needle will act in horizontal dircetion.

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It will move randomly in all directions. It can move in any direction. This is because the needle will try to get aligned vertically, but, it can't do so because it can move in a horizontal circle only.
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