Properties Of Solids And Liquids Question 370
Question: A square frame of side L is dipped in a liquid. On taking out, a membrane is formed. If the surface tension of the liquid is T, the force acting on the frame will be [MP PMT 1990; DPMT 2004]
Options:
A) 2 TL
B) 4 TL
C) 8 TL
D) 10 TL
Show Answer
Answer:
Correct Answer: C
Solution:
Force on each side $ =2TL $ (due to two surfaces)
$ \therefore $ Force on the frame =$ 4(2TL)=8TL $
