MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Air is more elastic than water. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
A thick wire is suspended from a rigid support and no load is attached to its free end but the wire is under stress. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
What is the effect of annealing on elasticity of materials? |
| A. | Increases the elasticity |
| B. | Decreases the elasticity |
| C. | Has no effect on elasticity |
| D. | Distorts the material |
| Answer» C. Has no effect on elasticity | |
| 4. |
Calculate the Young s modulus in the cantilever depression method. The length is 1m which is suspended with a load of 150gm. The depression is found to be 4cm. The thickness of the beam is 5mm and breadth is 3cm. |
| A. | 3.92 10<sup>10</sup> N/m<sup>2</sup> |
| B. | 9000 10<sup>10</sup> N/m<sup>2</sup> |
| C. | 4000 10<sup>10</sup> N/m<sup>2</sup> |
| D. | 1.245 10<sup>10</sup> N/m<sup>2</sup> |
| Answer» B. 9000 10<sup>10</sup> N/m<sup>2</sup> | |
| 5. |
What is the effect of hammering on elasticity of materials? |
| A. | Has no effect on elasticity |
| B. | Decreases the elasticity |
| C. | Increases the elasticity |
| D. | Breaks the material |
| Answer» D. Breaks the material | |
| 6. |
The modulus of rigidity and Poisson s ratio of the wire are 2.87 1010 N/m2 and 0.379 respectively. What is the value of young s modulus of the material of the wire. |
| A. | 1.08773 10<sup>10</sup> N/m<sup>2</sup> |
| B. | 7.915 10<sup>10</sup> N/m<sup>2</sup> |
| C. | 7.5725 10<sup>10</sup> N/m<sup>2</sup> |
| D. | 0.1403 10<sup>10</sup> N/m<sup>2</sup> |
| Answer» C. 7.5725 10<sup>10</sup> N/m<sup>2</sup> | |
| 7. |
A copper wire of length 3m and 1mm diameter is subjected to a tension of 5N. Calculate the elongation produced, if the young s modulus of copper is 120GPa. |
| A. | 15m |
| B. | 1800m |
| C. | 0.125 10<sup>-3</sup> m |
| D. | 15.9mm |
| Answer» E. | |
| 8. |
When too many people stand on a bridge it collapses, why? |
| A. | Due to increase in stress |
| B. | Due to overweight |
| C. | Due to improper construction |
| D. | Due to friction |
| Answer» B. Due to overweight | |