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qUESTIONS

MCQs-PYQs-12th-jee

The density p of water of bulk modulus B at a depth y in the ocean is related to the density at surface po by the relation

MCQs-PYQs-12th-jee

If 2 liquids of same masses but densities p₁ & P2 respectively are mixed, then density of mixture is given

MCQs-PYQs-12th-jee

A vertical U-tube of uniform inner cross section contains mercury in both sides of its arms. A glycerin (density = 1.3 g/cm³) column of length 10 cm is introduced into one of its arms. Oil of density 0.8 gm/cm³ is poured into the other arm until the upper surfaces of the oil and glycerin are in the same horizontal level. Find the length of the oil column, Density of mercury = 13.6 g/cm³

MCQs-PYQs-12th-jee

A barometer tube reads 76 cm of mercury. If the tube is gradually inclined at an angle of 60° with vertical, keeping the open end immersed in the mercury reservoir, the length of the mercury column will be

MCQs-PYQs-12th-jee

When a large bubble rises from the bottom of a lake to the surface. Its radius doubles. If atmospheric pressure is equal to that of column of water height H, then the depth of lake is

MCQs-PYQs-12th-jee

The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is d/2, then the viscous force acting on the ball will be

MCQs-PYQs-12th-jee

A lead shot of 1mm diameter falls through a long column of glycerine. The variation of its velocity v. with distance covered is represented by

MCQs-PYQs-12th-jee

A candle of diameter d is floating on a liquid in a cylindrical container of diameter D (D>>d) as shown in figure. If it is burning at the rate of 2cm/hour then the top of the candle will

MCQs-PYQs-12th-jee

By sucking through a straw, a student can reduce the pressure in his lungs to 750 mm of Hg (density = 13.6 gm/cm³). Using the straw, he can drink water from a glass up to a maximum depth of

MCQs-PYQs-12th-jee

A small sphere of radius ‘r’ falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to

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