Class 12 Physics Important Question UP Board. We covered all the Class 12 Physics Important Question UP Board in this post for free so that you can practice well for the exam.
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Class 12 Physics Quiz Practice Questions with Answers for Students
Two capillary tubes P and Q are dipped in water. The height of the water level in capillary P is 2/3 of the height in the Q capillary. The ratio of their diameters is :
(A) 2 : 3
(B) 3 : 2
(C) 3 : 4
(D) 4 : 3
Option b – 3 : 2
A capillary tube of radius r is immersed in water which rises to height h. The mass of water in the capillary tube is M. If another capillary tube of the double radius is immersed in the same water then the mass of water in the capillary tube will be :
(A) M
(B) 2 M
(C) M/2
(D) 4 M
Option b – 2 M
The angle of contact between glass and water is 0° and it rises in a capillary up to 6 cm when its surface tension is 70 dyne/cm. Another liquid of surface tension 140 dyne/cm, angle of contact 60° and relative density 2 will rise in the same capillary by
(A) 12 cm
(B) 24 cm
(C) 3 cm
(D) 6 cm
Option c – 3 cm
5 g of water rises in the bore of the capillary tube when it is dipped in water. If the radius of the bore of the capillary tube is doubled, the mass of water that rises in the capillary tube above the outside water level is :
(A) 1.5 g
(B) 5 g
(C) 10 g
(D) 15 g
Option c – 10 g
Two capillary tubes of the same material but of different radii are dipped in a liquid. The heights to which the liquid rises in the two tubes are 2.2 cm and 6.6 cm. The ratio of radii of the tubes is :
(A) 1 : 9
(B) 9 : 1
(C) 1 : 3
(D) 3 : 1
Option d – 3 : 1
If a liquid of specific gravity 1 rises to a height of 2.5 cm in the capillary tube then another liquid of specific gravity 1.25 will rise to the height (in the same tube) is :
(A) 1 cm
(B) 2 cm
(C) 1.25 cm
(D) 1.5 cm
Option b – 2 cm
The excess pressure inside one soap bubble is double that inside second. The volumes of the two bubbles are in the ratio :
(A) 1 : 9
(B) 9 : 1
(C) 8 : 1
(D) 1 : 8
Option d – 1 : 8
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