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qUESTIONS

MCQs-PYQs-12th-jee

The radii of the two columns in U tube are r₁ and 12 When a liquid of densityp (angle of contact is 0°) is filled in it the level difference of liquid in two arms is h The surface tension of liquid is (g = acceleration due to gravity)

MCQs-PYQs-12th-jee

A drop of water of radius 0.0015 mm is falling in air. If the coefficient of viscosity of air is 2.0×10 km m¯¹s the terminal velocity of the drop will be (g=10m s¯²)

MCQs-PYQs-12th-jee

Two syringes of different cross section (without needle) filled with water are connected with a tightly fitted rubber tube filled with water. Diameters of the smaller piston and larger piston are 1 cm and 3 cm respectively. If a force of 10 N is applied to the smaller piston then the force exerted on the larger piston is

MCQs-PYQs-12th-jee

A sphere falls from top and travels through some distance in liquid when it attains terminal velocity. Then

MCQs-PYQs-12th-jee

Water from a tap emerges vertically downwards with an initial speed of 1.0 m/s. The cross-sectional area of tap is 10-4 m². Assume that the pressure is constant throughout and that the flow is steady, the cross-sectional area of stream 0.15 m below the tap is:

MCQs-PYQs-12th-jee

A piston of a syringe pushes a liquid with a speed of 2 cm/s. The radius of the needle is 1/10 times that of the tube. The velocity of the liquid coming out of the needle

MCQs-PYQs-12th-jee

A capillary tube is attached horizontally to a constant head arrangement. If the radius of the capillary tube is increased by 10% then the rate of flow of liquid will change nearly by

MCQs-PYQs-12th-jee

A manometer connected to a closed tap reads 3.5 x 105N/m². When the valve is opened, the reading of manometer falls to 3 * 10 ^ 5 * N / (m ^ 2) then velocity of flow of water is

MCQs-PYQs-12th-jee

In making an alloy, a substance of specific gravity s₁ and mass m₁ is mixed with another substance of specific gravity s2 and mass m2; then the specific gravity of the alloy is

MCQs-PYQs-12th-jee

The flow rate of water from a tap of diameter 1.25 cm is 3 L per min. The coefficient of viscosity of water is 10 pa s. The nature of the flow is

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