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Question
Ball pen functions on which one of the following principle?
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Solution
The correct option is C Surface tension
Ball pen has roller ball at its pin which has ink on one side. This ink does not spill out, due to Surface Tension and remains intact unless the pen is moved over a paper.
Ball pen has roller ball at its pin which has ink on one side. This ink does not spill out, due to Surface Tension and remains intact unless the pen is moved over a paper.
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