Class XI Physics Revision Quiz on Mechanical Properties of Solids 2 for NEET & AIIMS Exams

Question 1

The Bulk modulus for an incompressible liquid is

Question 2

A ball of mass2 kg moving with velocity 3 m/s, collides with spring of natural length2m and force constant144N/m. What will be length of compressed spring?

Question 3

If two wire with the same cross-sectional area is attached end-to-end having different lengths. Length of first wire is 1 m and length of other wire is 2 m. Young’s modulus for first and second wire are 2x10⁹ N/m² and 3x10² N/m². If these two wires are to be replaced by a single wire such that total elongation is same with the same cross-sectional area and same total length. Find Young’s modulus of the new wire.

Question 4

An open container having bottom area of 40 cm² and top area 20 cm² is filled full with water up to a height of 10 cm. The volume of water is 1 litre. It is placed in a lift moving upward with an acceleration of g/2. Find the force exerted by the bottom on water.

Question 5

A beaker of 6 cm radius and 10 cm height contains water up to 5 cm of height. If a massless string of length equal to diameter of the beaker is kept on the surface of the water, what will be the force by which the surface on one side of the string pulls the surface on the other side? Surface tension of the water = 0.080 N/m.

Question 6

As shown in the figure, an opening having cross section of 2 cm² is drilled near the bottom of the tank having cross sectional area of 1 m². If a stone of 10 kg is placed on top of the water, then what will be velocity of the water coming out of the opening at the time when the height of the water level in the tank will be 30 cm above the bottom? (g= 10 m/s²)

Question 7

Water flows in a horizontal tube having two ends A and B having cross sectional area 50 cm² and 25 cm² respectively. What will be the rate of flow of water if the pressure between ends A and B change by 500 N/m²?

Question 8

Select the correct option from the following:
Statement I – There are two containers carrying same liquid A and B. A is at 40^oC and B is at 90^oC. Then the viscosity of the liquid A is more than liquid B.
Statement II - There are two containers carrying same gas A and B. A is at 40^oC and B is at 90^oC. Then the viscosity of the gas A is more than gas B.

Question 9

The speed of air flow on the upper and lower surfaces of a wing of an aero plane is v₁and v₂ respectively. If A is the cross section area of the wing and p is the density of air, then the upward lift is

Question 10

Direction: Each of these questions contains two statements. Assertion and Reason Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.

Assertion (A): The stream of water flowing at high speed from a garden hose, pipe tends to spread like a fountain when held vertically up but tends to narrow down when held vertically down.
Reason (R):In any steady flow of an incompressible fluid, the volume flow rate of the fluid remains constant.

Question 11

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 :-

Question 12

If a capillary is dipped in water and height of water rise in the capillary is measured. If the capillary is replaced by a capillary which has thrice the diameter, find % change in the mass the water above the water level.