MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A rod having = 1*10-5per C and length of 70cm has one of its end rigidly connected to another rod of length 1m and = 0.5*10-5per C. Find the new length of the two joined rods when their temperature is increased by 30 . |
| A. | 170.021cm |
| B. | 169.021cm |
| C. | 171.031cm |
| D. | 170.031cm |
| Answer» B. 169.021cm | |
| 2. |
What is the unit of coefficient of area expansion? |
| A. | per C |
| B. | C |
| C. | per ( C)<sup>2</sup> |
| D. | ( C)<sup>2</sup> |
| Answer» B. C | |
| 3. |
A uniform metal sheet has a hole in its centre. What happens to hole when the sheet is uniformly heated? |
| A. | Its size increases |
| B. | Its size decreases |
| C. | It changes shape |
| D. | Remains the same size |
| Answer» B. Its size decreases | |
| 4. |
What is the value of coefficient of area expansion for a sphere? Assume coefficient of linear expansion is . |
| A. | 2 |
| B. | |
| C. | 3 |
| D. | /2 |
| Answer» B. | |
| 5. |
A rod is lying on the ground with both ends free. It has a length of 1m. Coefficient of linear expansion equal to 1.1*10-5per &degC. Calculate the strain when the change in temperature is 10K. |
| A. | 11*10<sup>-5</sup> |
| B. | 1.1*10<sup>-5</sup> |
| C. | 0 |
| D. | 311.3*10<sup>-5</sup> |
| Answer» D. 311.3*10<sup>-5</sup> | |
| 6. |
What is the relation between coefficient of area expansion(A) and coefficient of volume expansion(B)? |
| A. | B = 1.5A |
| B. | A = 1.5B |
| C. | A = 3B |
| D. | B = 3A |
| Answer» B. A = 1.5B | |
| 7. |
What is the value of coefficient of volume expansion for an ideal gas? |
| A. | ( V/V)/ T |
| B. | 2*coefficient of linear expansion |
| C. | 1/3 * coefficient of linear expansion |
| D. | (V/ V)/ T |
| Answer» B. 2*coefficient of linear expansion | |
| 8. |
The value of coefficient of thermal expansion is always the same for a material. True or False? |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
It is possible that with decrease in temperature volume may increase. True or False? |
| A. | True |
| B. | False |
| Answer» B. False | |