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Today General Knowledge(GK)
Ball pen functions on the principle of
A)
Surface tension
B)
Doppler effect
C)
Gravitational force
D)
Lenz's law

Correct Answer : Option (A) - 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
Category : Science and Technology
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