Question 1 :
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 2 :
Change in the shape of a body caused by the application of a force (stress) is called as :<br/>

Question 4 :
The elastic energy stored per unit volume in a stretched wire is

Question 5 :
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 6 :
The temperature of a wire is doubled. The Young's modulus of elasticity will ?

Question 7 :
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 10 :
The extension produced in a wire by the application of a load is $3.0$ mm. The extension produced in a wire of the same material and length but half the radius by the same load is:

Question 11 :
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 12 :
State whether true or false :<br>The metal used in construction of a bridge should have high Young's modulus.<br><br>

Question 13 :
When a rubber cord is stretched, the change in volume is negligible compared to the change in its linear dimension. Then poisson's ratio for rubber is

Question 14 :
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 15 :
Substances which can be stretched to cause large strains are called

Question 16 :
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 17 :
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 18 :
Solids which break or rupture above the elastic&#160;limit are classified as:

Question 19 :
If longitudinal strain for a wire is $0.03$ and its poisson ratio is $0.5$, then its lateral strain is

Question 22 :
The property of a material due to which shape is changed permanently is known as:<br/>

Question 25 :
Assertion: Stress is the internal force per unit area of a body. Reason: Rubber is more elastic than steel.

Question 27 :
The property of metals which allows them to be drawn into wires is known as :<br/>

Question 28 :
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 29 :
A wire suspended vertically from one of its ends is stretched by attaching a weight of $200N$ to the lower end. The weight stretches the wire by $1mm$. Then the elastic energy stored in the wire is