The surface tension of a liquid is 80 dyne-cm- Its relative density is 0-8- If the angle of contact between the liquid and glass is 60- find the height to which the liquid rises in a glass capillary tube of radius 1 mm - g -10 m - s 2A- 2 cmB- 0-5 cmC- 1 cmD- 4 cm

The correct option is C 1 cm h=2T cos θ/rgd (T – surface tension, d → density) ...

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Standard XII

Physics

Pressure

The surface t...

Question

The surface tension of a liquid is 80 dyne/cm. Its relative density is 0.8. If the angle of contact between the liquid and glass is $60^{\circ}$ , find the height to which the liquid rises in a glass capillary tube of radius 1 mm. $(g = 10 m / s^{2})$

0.5 cm

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2 cm

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1 cm

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4 cm

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Solution

The correct option is C
1 cm

$h = \frac{2 T c o s θ}{r g d}$ (T – surface tension, d $\to$ density)

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The surface tension of a liquid is 80 dyne/cm. Its relative density is 0.8. If the angle of contact between the liquid and glass is 60∘, find the height to which the liquid rises in a glass capillary tube of radius 1 mm. (g=10 m/s2)

The correct option is C 1 cm h=2T cos θrgd (T – surface tension, d → density)

The surface tension of a liquid is 80 dyne/cm. Its relative density is 0.8. If the angle of contact between the liquid and glass is $60^{\circ}$ , find the height to which the liquid rises in a glass capillary tube of radius 1 mm. $(g = 10 m / s^{2})$

The correct option is C
1 cm

$h = \frac{2 T c o s θ}{r g d}$ (T – surface tension, d $\to$ density)