MCQOPTIONS
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MCQOPTIONS
This section includes 11 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 piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a room that is dimly lit, then ___________ |
| A. | The blue piece will look blue and red will look as usual |
| B. | Red looks brighter and blue looks ordinary blue |
| C. | Blue shines like brighter red compared to the red pieces |
| D. | Both the pieces will look equally red |
| Answer» D. Both the pieces will look equally red | |
| 2. |
Temperatures of two stars are in ratio 3:2. If wavelength of maximum intensity of first body is 4000 , what is corresponding wavelength of second body? |
| A. | 9000 |
| B. | 6000 |
| C. | 2000 |
| D. | 8000 |
| Answer» C. 2000 | |
| 3. |
A composite rod made of copper (1.8 10(-5) K(-1)) and steel ( =1.2 10(-5) K(-1)) is heated. Then ___________ |
| A. | It bends with steel on concave side |
| B. | It bends with copper on concave side |
| C. | It does not expand |
| D. | Data is insufficient |
| Answer» B. It bends with copper on concave side | |
| 4. |
On a hilly region, water boils at 95 C. What is the temperature expressed in Fahrenheit? |
| A. | 100 F |
| B. | 203 F |
| C. | 150 F |
| D. | 20.3 F |
| Answer» C. 150 F | |
| 5. |
If the sun were to increase in temperature from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on earth to what it was previously, will be ___________ |
| A. | 4 |
| B. | 16 |
| C. | 32 |
| D. | 64 |
| Answer» E. | |
| 6. |
An ideal black body is thrown into a furnace. The black body is room temperature. It is observed that ___________ |
| A. | Initially, it is darkest body and at later times the brightest |
| B. | At all times it is the darkest body |
| C. | It cannot be distinguished at all times |
| D. | Initially, it is the darkest body and at later it cannot be distinguished |
| Answer» B. At all times it is the darkest body | |
| 7. |
540g of ice at 0 C is mixed with 540g of water at 80 C. What is the final temperature of the mixture? |
| A. | 0 C |
| B. | 40 C |
| C. | 80 C |
| D. | Less than 0 C |
| Answer» B. 40 C | |
| 8. |
Compared to burn due to air at 100 C, a burn due to steam at 100 C is ___________ |
| A. | More dangerous |
| B. | Less dangerous |
| C. | Equally dangerous |
| D. | Not dangerous |
| Answer» B. Less dangerous | |
| 9. |
Calorie is defined as the amount of heat required to raise the temperature of 1g of water by 1 C and it is defined under which of the following conditions? |
| A. | From 14.5 C to 15.5 C at 760mm of Hg |
| B. | From 98.5 C to 99.5 C at 760mm of Hg |
| C. | From 13.5 C to 14.5 C at 76mm of Hg |
| D. | From 3.5 C to 4.5 C at 76mm of Hg |
| Answer» B. From 98.5 C to 99.5 C at 760mm of Hg | |
| 10. |
The thermometer bulb should have ___________ |
| A. | High heat capacity |
| B. | No heat capacity |
| C. | Small heat capacity |
| D. | Varying heat capacity |
| Answer» D. Varying heat capacity | |
| 11. |
A faulty thermometer has its fixed points marked as 5 and 95 . The temperature of a body as measured by the faulty thermometer is 59 . Find the correct temperature of the body on a Celsius scale. |
| A. | 60 C |
| B. | 40 C |
| C. | 20 C |
| D. | 0 C |
| Answer» B. 40 C | |