Question 1 :
Assertion: If we apply force to a lump of putty or mud, they have no gross tendency to regain their previous shape. Reason: This type of substances are called plastic substances.

Question 2 :
A compressive force is applied to a uniform rod of rectangular cross-section so that its length decreases by $1\%$. If the Poisson’s ratio for the material of the rod be $0.2$, which of the following statements is correct ? The volume approximately .....”

Question 3 :
The ratio of lateral strain to the linear strain within elastic limit is known as:

Question 4 :
A wire whose cross-sectional area is $4\ mm^{2}$ is stretched by $0.1\ mm$ by a certain load. If a similar wire of double the area of cross-section is under the same load, then the elongation would be

Question 5 :
A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then the elastic energy stored in the wire is:          

Question 8 :
 A cable that can support a load of 1000 N is cut into equal parts. the maximum load that can be supported by the either part is:-

Question 9 :
State whether true or false :<br>The hollow shaft is much stronger than a solid shaft of same mass, same length and same material.

Question 10 :
Fill in the blank.<br/>In a technical sense a substance with a ________ elasticity is one that&#160;requires a ______ &#160;force to produce a distortion-for example, a steel sphere.&#160;<br/><br/>

Question 11 :
Assertion (A): Steel is more elastic than rubber.<br/>Reason (R) : Under a given deforming force, steel&#160;is deformed less than rubber.<br/>A) Both Assertion and Reason are true and the&#160;reason is correct explanation of the assertion<br/>B)Both Assertion and Reason are true, but reason&#160;is not correct explanation of the assertion<br/>C) Assertion is true, but the reason is false<br/>D) Assertion is false, but the reason is true

Question 13 :
The volumetric change of the fluid caused by a resistance is known as :<br/>

Question 14 :
The property of metals which allows them to be drawn readily into thin wires is:

Question 16 :
A wire ($Y=2\times {10}^{11}N/m$) has length $1m$ and area $1m{m}^{2}$. The work required to increased its length by $2mm$ is

Question 17 :
The force required to double the length of the steel wire of area of cross section $5\times 10^{-5}m^{2}\quad (Y=20\times 10^{10}Pa)$ in $N$ is:

Question 18 :
Assertion: Stress is the internal force per unit area of a body. Reason: Rubber is more elastic than steel.

Question 19 :
A material has poisson's ratio 0.5. If a uniform rod of it suffers a longitudinal strain of $3\times { 10 }^{ -3 }$, what will be percentage increase in volume?

Question 20 :
A steel cable with a radius $2cm$ supports a chairlift at a ski area. If the maximum stress is not to exceed ${ 10 }^{ 8 }N\quad { m }^{ -2 }$, the maximum load the cable can support is

Question 24 :
A weightless rod is acted on by upward parallel forces of $2N$ and $4N$ ends $A$ and $B$ respectively.; The total length of the rod $AB=3m$. To keep the rod in equilibrium a force of $6N$ should act in the following manner.

Question 26 :
When a body undergoes a linear tensile strain if experience a lateral contraction also. The ratio of lateral contraction to longitudinal strain is known as

Question 29 :
Solids which break or rupture above the elastic&#160;limit are classified as:

Question 30 :
The Young's modulus of a wire of length $L$ and radius $r$ is $Y$. If the length is reduced to $\cfrac{L}{2}$ and radius is $\cfrac{r}{2}$, then the Young's modulus will be

Question 31 :
A spring is made of steel and not of copper because

Question 32 :
In Youngs expt., the distance between two slits&#160;is d/3 and the distance between the screen and the slits is 3D. The number of&#160;fringes in 1/3 m on the screen, formed by monochromatic light of wavelength&#160;$3\lambda $,&#160;will be?&#160;

Question 34 :
Let ${Y}_{S}$ and ${Y}_{A}$ represent Young's modulus for steel and aluminium respectively It is said that steel is more elastic than aluminium. Therefore, it follows that

Question 35 :
The elastic energy stored per unit volume in a stretched wire is

Question 37 :
Assertion: Strain is a unitless quantity. Reason: Strain is equivalent to force

Question 40 :
The property to restore the natural shape or to oppose the deformation is called :