MHT CET202019 Oct 2020Evening ShiftPhysicsMechanical Properties of FluidsActual
If the surface tension of a soap solution is 3 10⁻² ~N / m , then the work done in forming a soap film of 20 ~cm 5 ~cm will be
Options
- A6 10⁻³ ~J
- B6 10⁻⁴ ~J
- C6 10⁻² ~J
- D6 ~J
Correct answer
B. 6 10⁻⁴ ~J
Step-by-step solution
(C) aligned W &=2 T A &=2 3 10⁻² 100 10⁻⁴ &=6 10⁻⁴ ~J aligned