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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS

1 Medium

1 of 1

Application +4 | -1

A straw

6\,cm

long floats on water. The water film on one side has surface tension of

50\,dyne/cm

on the other side camphor reduces the surface tension to

40\,dyne/cm

.The force is

View answer and explanation

Correct option: A

\left( {50 \times 6 - 40 \times 6} \right)dyne

Option A (

\left( {50 \times 6 - 40 \times 6} \right)dyne

) is correct because the net force is the difference in surface tension multiplied by the length of the straw.

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