MHT CET202312 May 2023Morning ShiftPhysicsMechanical Properties of FluidsActual
Consider a soap film on a rectangular frame of wire of area 3 3 ~cm ^2 . If the area of the soap film is increased to 5 5 ~cm ^2 , the work done in the process will be (surface tension of soap solution is 2.5 10⁻² ~N / m )
Options
- A9 10⁻⁶ ~J
- B16 10⁻⁶ ~J
- C40 10⁻⁶ ~J
- D80 10⁻⁶ ~J
Correct answer
D. 80 10⁻⁶ ~J
Step-by-step solution
aligned & A₁=9 10⁻⁴ ~m ^2, A₂=25 10⁻⁴ ~m ^2 & T=2.5 10⁻² ~N / m aligned Work done, aligned & W=2 T A=2 2.5 10⁻² (25-9) 10⁻⁴ & W=80 10⁻⁶ ~J aligned