MCQOPTIONS
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MCQOPTIONS
This section includes 12 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 constant volume gas thermometer using helium records a pressure of 20.0kPa at the triple point of water and pressure of 14.3 kPa at the temperature of dry ice . What is the temperature of dry ice? |
| A. | 19.530K |
| B. | 1.9530K |
| C. | 195.30K |
| D. | 1953.0K |
| Answer» D. 1953.0K | |
| 2. |
80g of water at 30 C is poured on a large block of ice which is at 0 C. The mass of ice that melts is ___________ |
| A. | 30g |
| B. | 80g |
| C. | 150g |
| D. | 1600g |
| Answer» B. 80g | |
| 3. |
The thermal capacity of 40g of aluminium (specific heat = 0.2 cal g-1 C-1) is ___________ |
| A. | 40cal C<sup>-1</sup> |
| B. | 160 cal C<sup>-1</sup> |
| C. | 200 cal C<sup>-1</sup> |
| D. | 8 cal C<sup>-1</sup> |
| Answer» E. | |
| 4. |
Two containers A and B are partly filled with water and closed. The volume of A is twice that of B and it contains half the amount of water in B. If both are at same temperature, the water vapour in the containers will have pressure in the ratio of ___________ |
| A. | 1:2 |
| B. | 1:1 |
| C. | 2:1 |
| D. | 4:1 |
| Answer» C. 2:1 | |
| 5. |
The Wien s displacement law expresses a relation between ___________ |
| A. | Wavelength corresponding to maximum energy and absolute temperature |
| B. | Radiated energy and wavelength |
| C. | Temperature and emissive power |
| D. | Colour of light and emissive power |
| Answer» B. Radiated energy and wavelength | |
| 6. |
Assertion: In a pressure cooker the water is about to be boiled. The cooker is then removed from the stove. Now on removing the lid of the pressure cooker, the water boils again.
|
| A. | Both assertion and reason are true and the reason is the correct explanation of the assertion |
| B. | Both assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | Assertion is true but the reason is false |
| D. | Both assertion and reason are false |
| Answer» D. Both assertion and reason are false | |
| 7. |
Assertion: Water kept in an open vessel will quickly evaporate on the surface of the moon.
|
| A. | Both assertion and reason are true and the reason is the correct explanation of the assertion |
| B. | Both assertion and reason are true but the reason is not the correct explanation of the assertion |
| C. | Assertion is true but the reason is false |
| D. | Both assertion and reason are false |
| Answer» D. Both assertion and reason are false | |
| 8. |
50g of ice at 0 C is mixed with 50g of water at 80 C, what will be the final temperature of a mixture? |
| A. | 0 C |
| B. | 40 C |
| C. | 60 C |
| D. | 4 C |
| Answer» B. 40 C | |
| 9. |
If boiling point of water is 95 F, what will be reading at Celsius scale? |
| A. | 7 C |
| B. | 65 C |
| C. | 63 C |
| D. | 35 C |
| Answer» E. | |
| 10. |
According to Newton s law of cooling, the rate at which a body cools is proportional to ( )n, where is the difference if the temperature of the body and the surroundings. What is n equal to? |
| A. | Two |
| B. | Three |
| C. | Four |
| D. | One |
| Answer» E. | |
| 11. |
Heat was given to a body, which raises its temperature by 1 C is ___________ |
| A. | Water equivalent |
| B. | Temperature gradient |
| C. | Thermal capacity |
| D. | Specific heat |
| Answer» D. Specific heat | |
| 12. |
Same material is used to make a sphere, a cube and a thin circular plate and having the same mass. They are initially heated to a temperature of 3000 C. Which of these will cool fast? |
| A. | Sphere |
| B. | Cube |
| C. | Plate |
| D. | All thee will cool at the same rate |
| Answer» D. All thee will cool at the same rate | |