Physics MCQs for NEET — Practice Questions with Answers

Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by $75\times {10}^{-4} \mathrm{N}$ force due to the weight of the liquid. If the surface tension of water is $6\times {10}^{-2} {\mathrm{Nm}}^{-1}$, the inner circumference of the capillary must be

Two capillary tubes P and Q are dipped in water. The height of water level in capillary P is 2/3 to the height in Q capillary. The ratio of their diameters is

A vessel, whose bottom has round holes with diameter of 0.1mm, is filled with water. The maximum height to which the water can be filled without leakage is
(S.T. of water =75 dyne/cm, g =1000 $\mathrm{cm}/{\mathrm{s}}^2$)

Water rise in a capillary tube when its one end is dipped vertically in it, is 3 cm. If the surface tension of water is $75\times {10}^{-3} \mathrm{N}/\mathrm{m}$, then the diameter of capillary will be

By inserting a capillary tube upto a depth l in water, the water rises to a height h ( h<l). If the lower end of the capillary is closed inside water and the capillary is taken out and closed end opened, to what height the water will remain in the tube ?

If the surface tension of water is 0.06 ${\mathrm{Nm}}^{-1}$, then the capillary rise in a tube of diameter 1 mm is ( $\mathrm{\theta }$=0° )

A capillary tube when immersed vertically in liquid records a rise of 3 cm. If the tube is immersed in the liquid at an angle of $60°$ with the vertical. The length of the liquid column along the tube is 

The action of a nib split at the top is explained by

The correct relation is

During capillary rise of a liquid in a capillary tube, the surface of contact that remains constant is of