JEE Advanced2010PhysicsMechanical Properties of FluidsActual
Paragraph: When liquid medicine of density is to be put in the eye, it is done with the help of a dropper. As the bulb on the top of the dropper is pressed, a drop forms at the opening of the dropper. We wish to estimate the size of the drop. We first assume that the drop formed at the opening is spherical because that requires a minimum increase in its surface energy. To determine the size, we calculate the net vert
Options
- A1.4 10⁻⁶ ~J
- B2.7 10⁻⁶ ~J
- C5.4 10⁻⁶ ~J
- D8.1 10⁻⁹ ~J
Correct answer
B. 2.7 10⁻⁶ ~J
Step-by-step solution
Surface energy, aligned E & = (4 R^2 ) T & =(4 ) (1.4 10⁻³ )^2(0.11) & =2.7 10⁻⁶ ~J aligned The correct option is (b).