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 $



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