Question

Which of the following cannot be explained on the basis of Bernoulli's principle?

• A. Lift on an aircraft's wing
• B. Ink filler
• C. Swing of a cricket ball
• D. Atomizer

Answer 1

The correct option is B Ink filler

Aircraft Wing adjusts its vertical position with the help of lift on its wings. The region below the wing is at high pressure and at lower region is at low pressure. The uplift occurs due to this pressure difference.

Ink Filler works on the principle of both surface tension and pumps. Vacuum in the pen pulls the ink in the bottle to the pen. This ink travels through the small opening in the pen tip due to surface tension (to minimize the surface area).

Swing of a cricket ball is governed by the pressure difference caused on the two sides of the ball due to an initial spin.

Atomizer is an application of Bernoulli's principle. When a fast gas stream is injected into the atmosphere and across the top of the vertical tube, it is forced to follow a curved path up, over and downward on the other side of the tube. This curved path creates a lower pressure on the inside of the curve at the top of the tube. This curve-caused lower pressure near the tube and the atmospheric pressure further up is the net force.