Advertisements
Advertisements
प्रश्न
What are the factors affecting the surface tension of a liquid?
Advertisements
उत्तर
- The presence of any contamination or impurities.
- The presence of dissolved substances.
- Electrification
- Temperature
APPEARS IN
संबंधित प्रश्न
Figure (a) shows a thin liquid film supporting a small weight = 4.5 × 10–2 N. What is the weight supported by a film of the same liquid at the same temperature in Fig. (b) and (c)? Explain your answer physically.

In a conical pendulum, a string of length 120 cm is fixed at rigid support and carries a mass
of 150 g at its free end. If the mass is revolved in a horizontal circle of radius 0.2 m around a
vertical axis, calculate tension in the string (g = 9.8 m/s2)
The contact angle between water and glass is 0°. When water is poured in a glass to the maximum of its capacity, the water surface is convex upward. The angle of contact in such a situation is more than 90°. Explain.
Water near the bed of a deep river is quiet while that near the surface flows. Give reasons.
When water droplets merge to form a bigger drop
Which of the following graphs may represent the relation between the capillary rise hand the radius r of the capillary?

The energy stored in a soap bubble of diameter 6 cm and T = 0.04 N/m is nearly ______.
What is capillarity?
Under isothermal conditions, two soap bubbles of radii 'r1' and 'r2' coalesce to form a big drop. The radius of the big drop is ______.
The excess pressure inside a liquid drop is 500 Nm-2. If the radius of the drop is 2 mm, the surface tension of the liquid is x × 10-3 Nm-1. The value of x is ______.
