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Question
Ball pen and fountain pen depends respectively on principle of:-
Ball pen and fountain pen depends respectively on principle of:-
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Solution
The correct option is A Surface tension and viscosity
Ball pen functions on the principle of surface tension. Pen is fitted with a tiny ball bearing in its tip. As the pen moves along the paper, the ball rotates picking up ink from the ink cartridge and leaving it on the paper. So Answer is SURFACE TENSION.
Ball pen functions on the principle of surface tension. Pen is fitted with a tiny ball bearing in its tip. As the pen moves along the paper, the ball rotates picking up ink from the ink cartridge and leaving it on the paper. So Answer is SURFACE TENSION.
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