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Science and Technology - General Knowledge Questions
Ball pen functions on the principle of
A)
Surface tension
B)
Doppler effect
C)
Gravitational force
D)
Lenz's law

Correct Answer :   Surface tension

The principle behind the working of a ball pen is surface tension and gravity. The ink gets spread over the ball due to surface tension. The flow of ink to the ball is based on the surface tension. If the surface tension is high, the ink won't spread over the ball properly.

Published On : June 9, 2021
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