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| Q. |
A fountain pen works on the principle of |
| A. | Flow of liquids from higher to lower potential |
| B. | Capillary action |
| C. | Bernoulli's principle |
| D. | Viscosity of liquids |
| Answer» B. Capillary action | |
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Explanation: A fountain pen is a nib pen that, unlike its predecessor the dip pen, contains an internal reservoir of water-based liquid ink. The pen draws ink from the reservoir through a feed to the nib and deposits it on paper via a combination of gravity and capillary action. Capillary action, or capillarity, is the ability of a liquid to flow in narrow spaces without the assistance of, and in opposition to external forces like gravity. |
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