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    5. Ball pen functions on the principle of :

    Question

    Ball pen functions on the principle of

    :
    A Viscosity Correct Answer Incorrect Answer
    B Boyle's Law Correct Answer Incorrect Answer
    C Gravitational force Correct Answer Incorrect Answer
    D Surface tension Correct Answer Incorrect Answer

    Solution

    The ballpoint pen is one of the most simple and yet ubiquitous devices whose function depends on surface tension. With a pen held upright, gravity and surface tension act in concert to get ink onto the ball.

    Practice Next
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