Question

A dip needle is a small magnet mounted on ahorizontal axis so that it can swivel up or down like a compass turned on it's side) where on earth will a dip needle point most nearly vertically? where will it point most nearly horizontally?

Answers

When free to move in any direction, magnetic needles tend to align themselves with the magnetic lines of force of the earth. Take a look at this figure and then you should be able to answer the question:
http://www.open2.net/open2static/source/file/root/15/0/61463/magnetic.jpg

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