Elastic Limit Multiple Questions and Answers.
Exercise Questions ::
Thermal Properties of Matter
6. | If in a wire of Young’s modulus Y, longitudinal strain is produced, then the value of potential energy stored in its unit volume will be? |
| |
| A. | YX2 |
| B. | YX2 |
| C. | 2YX2 |
| D. | 0.5YX2 |
|
|
| Answer: Option D |
|
|
| Explanation: |
|
Potential energy stored per unit volume, u=1/2×Stress×Strain=1/2 (Y×Strain)×Strain u=0.5YX2. |
| See More Information |
|
|
|
Tutorial Link: |
Published by:Michael Daani
| Answer: Option B |
|
|
| Explanation: |
|
The work done in stretching the rubber is stored as its potential energy. |
| See More Information |
|
|
|
Tutorial Link: |
Published by:Michael Daani
| Answer: Option C |
|
|
| Explanation: |
|
The stress at which rupture of the wire occurs is called its breaking stress. Its value depends on the material of the wire. |
| See More Information |
|
|
|
Tutorial Link: |
Published by:Michael Daani
9. | Which of the following affects the elasticity of a substance? |
| |
| A. | Hammering and annealing |
| B. | Change in temperature |
| C. | Impurity in substance |
| D. | All of the mentioned |
|
|
| Answer: Option D |
|
|
| Explanation: |
|
All the factors change in temperature, hammering and annealing and impurity in substance affects the elasticity of a substance. |
| See More Information |
|
|
|
Tutorial Link: |
Published by:Michael Daani
10. | The diameter of brass rod is 4mm. Young’s modulus of brass is 9×109 N/m2. The force required to stretch 0.1% of its length is? |
| |
| A. | 360πN |
| B. | 36N |
| C. | 36π×105 N |
| D. | 144π×103N |
|
|
| Answer: Option A |
|
|
| Explanation: |
|
∆l/l=0.1/100 F=YA∆l/l=(Y×πr2×∆l)/l F=(9×109×π×(2×10(-3))2×0.1)/100 N=360πN. |
| See More Information |
|
|
|
Tutorial Link: |
Published by:Michael Daani
«