SATHEE: Properties of Matter 4 Question 8

Properties of Matter 4 Question 8

10. If the radius of the opening of the dropper is $r$ , the vertical force due to the surface tension on the drop of radius $R$ (assuming $r « R$ ) is

(a) $2 π r T$

(b) $2 π R T$

(d) $\frac{2 π R^{2} T}{r}$

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Answer:

Correct Answer: 10. (c)

Solution:

Vertical force due to surface tension,

$F_{v} = F \sin θ = (T 2 π r) (r / R) = \frac{2 π r^{2} T}{R}$

$∴$ Correct option is (c).

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Properties of Matter 4 Question 8

10. If the radius of the opening of the dropper is r, the vertical force due to the surface tension on the drop of radius R (assuming «r«R ) is

Answer:

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10. If the radius of the opening of the dropper is $r$ , the vertical force due to the surface tension on the drop of radius $R$ (assuming $r « R$ ) is