AIIMS Physics Mechanical Properties of Solids Class 11 Questions

A 2 m long rod of radius 1 cm which is fixed from one end is given a twist of 0.8 radians. The shear strain developed will be

The fractional change in volume of a glass slab when subjected to a hydraulic pressure of 10 atm is:

[Bulk modulus of glass = $37 \times 10^9 \text{ N/m}^2$]

A film of water is formed between two straight parallel wires of length $10\text{ cm}$ each separated by $0.5\text{ cm}$. If their separation is increased by $1\text{ mm}$ while still maintaining their parallelism, how much work will have to be done? (Surface tension of water = $7.2 \times 10^{-2}\text{ N/m}$)

Two wires of equal lengths are made of the same material wire. A has a diameter that is twice as that of wire B. If identical weights are suspended from the ends of these wires the increase on length is

A stress of 6×10⁶ Nm⁻² is required for breaking a material. The density ρ of the material is 3×10³ kgm⁻³. If the wire to break under its own weight, the length of the wire made of that material should be (take g = 10 ms⁻²)

Assertion: The stress-strain graphs are shown in the figure for two materials A and B are shown in figure. Young’s modulus of A is greater than that of B. Reason: The Young’s modulus for small strain is, Y = stress/strain = slope of linear portion of graph; and slope of A is less than slope that of B.

A cylindrical wire is twisted with an angle θ, what is torsion produced in it?

If a wire is extended to a new length l', the work done is

Assertion : The size of a hydrogen balloon increases as it rises in air.

Reason : The material of the balloon can be easily stretched.

The breaking stress of a wire depends upon

Assertion : Stress is the internal force per unit area of a body.

Reason : Rubber is more elastic than steel.