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qUESTIONS

MCQs-PYQs-12th-jee

A soap bubble, having radius of 1mm, is blown from a detergent solution having a surface tension of 2.5×102N/m. The pressure inside the bubble equals at a point Zo below the free surface of water in a container. Taking g = 10m/s², density of water = 103kg/m³ the value of Zo is

MCQs-PYQs-12th-jee

Three liquids of densities P1,P2 and p3 (with P₁ .. P2.. P3), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact 01,02 and 03 obey

MCQs-PYQs-12th-jee

A rectangular film of liquid is extended from (4cm * 2cm) to(5cm * 4cm) If the work done is 3 * 10 ^ – 4 * e , the value of the surface tension of the liquid is2

MCQs-PYQs-12th-jee

A certain number of spherical drops of a liquid of radius r coalesce to form a single drop of radius R and volume V. If ‘T is the surface tension of the liquid, then

MCQs-PYQs-12th-jee

Water rises in a vertical capillary tube up to a height of 2.0 cm. If the tube is inclined at an angle of 60º with the vertical, then up to what length the water will rise in the tube

MCQs-PYQs-12th-jee

Two capillary tubes of same diameter are put vertically one each in two liquids whose relative densities are 0.8 and 0.6 and surface tensions are 60 and 50 dyne/cm respectively ratio of heights of liquids in the two tubes h1/h2

MCQs-PYQs-12th-jee

When a capillary is dipped in water, water rises 0.015 m in it. If the surface tension of water is 75×10-3 N/m, the radius of capillary is

MCQs-PYQs-12th-jee

Two capillary tubes of radii 0.2 cm and 0.4 cm are dipped in the same liquid. The ratio of heights through which liquid will rise in the tubes is

MCQs-PYQs-12th-jee

In a capillary tube, water rises to 3 mm. The height of water that will rise in another capillary tube having one-third radius of the first is

MCQs-PYQs-12th-jee

A soap bubble in vacuum has a radius of 3 cm and another soap bubble in vacuum has a radius of 4 cm. If the two bubbles coalesce under isothermal condition, then the radius of the new bubble is

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