MCQOPTIONS
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MCQOPTIONS
This section includes 6 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. |
A body of weight mg is hanging on a string that extends in length by l. The work done in extending the string is ___________ |
| A. | mgl |
| B. | mgl/2 |
| C. | 2mgl |
| D. | 0 |
| Answer» C. 2mgl | |
| 2. |
Which of the following have well defined geometrical external shapes? |
| A. | Amorphous solids |
| B. | Liquids |
| C. | Gases |
| D. | Crystalline solids |
| Answer» E. | |
| 3. |
The term liquid crystal refers to a state that is intermediate between ___________ |
| A. | Crystalline solid and amorphous liquid |
| B. | Crystalline solid and vapour |
| C. | Amorphous liquid and its vapour |
| D. | A crystal immersed in a liquid |
| Answer» B. Crystalline solid and vapour | |
| 4. |
An example of a perfectly plastic body is ___________ |
| A. | Quartz |
| B. | Crystal |
| C. | Putty |
| D. | Rubber |
| Answer» D. Rubber | |
| 5. |
Two wires have the same material and have the same volume. However wire 1 had cross sectional area A and wire 2 has cross sectional area 3A. If the length of wire 1 increases by x on applying force F, how much force is needed to stretch wire 2 by the same amount? |
| A. | F |
| B. | 4F |
| C. | 6F |
| D. | 9F |
| Answer» E. | |
| 6. |
If the stress is S and the Young s modulus is Y of material of a wire, the energy stored in the wire per unit volume is? |
| A. | 2Y/S |
| B. | S/2Y |
| C. | 2S<sup>2</sup> Y |
| D. | S<sup>2</sup>/ 2Y |
| Answer» E. | |