MCQOPTIONS
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MCQOPTIONS
This section includes 21 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. |
Assertion: The radiation from the sun’s surface varies as the fourth power of its absolute temperature.Reason: Sun is not a black body. |
| 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 | |
| 2. |
Assertion: For higher temperatures, the peak emission wavelength of a black body shifts to lower wavelengths.Reason: Peak emission wavelength of black body is proportional to the fourth power of temperatures. |
| 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 | |
| 3. |
If the amount of heat energy received per unit area from the sun is measured on earth, mars and Jupiter, it will be ___________ |
| A. | The same for all |
| B. | In decreasing order Jupiter, Mars, Earth |
| C. | In increasing order Jupiter, Mars, Earth |
| D. | In decreasing order Mars, Earth, Jupiter |
| Answer» D. In decreasing order Mars, Earth, Jupiter | |
| 4. |
Ratio of the amount of heat radiation, transmitted through the body to the amount of heat radiation incident on it, is known as ___________ |
| A. | Conductance |
| B. | Inductance |
| C. | Transmittance |
| D. | Absorbance |
| Answer» D. Absorbance | |
| 5. |
Woollen clothes keep the body warm because of wool ___________ |
| A. | Is a bad conductor |
| B. | Increases the temperature of body |
| C. | Decreases the temperature |
| D. | Has no effect |
| Answer» B. Increases the temperature of body | |
| 6. |
On a cold morning, a metal surface will feel colder to touch than a wooden surface, because of ___________ |
| A. | Metal has high specific heat |
| B. | Metal has high thermal conductivity |
| C. | Metal has low specific heat |
| D. | Metal has low thermal conductivity |
| Answer» C. Metal has low specific heat | |
| 7. |
At a common temperature, a block of wood and a block of metal feel equally cold or hot. The temperatures of block and wood are ___________ |
| A. | Equal to the temperature of the body |
| B. | Less than the temperature of the body |
| C. | Greater than the temperature of the body |
| D. | Has no change |
| Answer» B. Less than the temperature of the body | |
| 8. |
The sprinkling of water reduces slightly the temperature of a closed room because of ___________ |
| A. | Temperature of water is less than that of the room |
| B. | Specific heat of water is high |
| C. | Water has large latent heat of vaporisation |
| D. | Water is a bad conductor of heat |
| Answer» D. Water is a bad conductor of heat | |
| 9. |
A pressure cooker reduces cooking time for food, because ___________ |
| A. | Heat is more evenly distributed in the cooking space |
| B. | The higher pressure inside the cooker crushes the food material |
| C. | Cooking involves chemical changes helped by a rise in temperature |
| D. | Boiling point of water involved in cooking is increased |
| Answer» E. | |
| 10. |
RATIO_OF_THE_AMOUNT_OF_HEAT_RADIATION,_TRANSMITTED_THROUGH_THE_BODY_TO_THE_AMOUNT_OF_HEAT_RADIATION_INCIDENT_ON_IT,_IS_KNOWN_AS?$ |
| A. | Conductance |
| B. | Inductance |
| C. | Transmittance |
| D. | Absorbance |
| Answer» D. Absorbance | |
| 11. |
Assertion: For higher temperatures, the peak emission wavelength of a black body shifts to lower wavelengths |
| A. | None of these |
| B. | Both assertion and reason are true and the reason is the correct explanation of the assertion |
| C. | Both assertion and reason are true but the reason is not a correct explanation of the assertion |
| Answer» D. | |
| 12. |
If_the_amount_of_heat_energy_received_per_unit_area_from_the_sun_is_measured_on_earth,_mars_and_Jupiter,_it_will_be$ |
| A. | The same for all |
| B. | In decreasing order Jupiter, Mars, Earth |
| C. | In increasing order Jupiter, Mars, Earth |
| D. | In decreasing order Mars, Earth, Jupiter |
| Answer» D. In decreasing order Mars, Earth, Jupiter | |
| 13. |
Assertion: The radiation from the sun’s surface varies as the fourth power of its absolute temperature$ |
| A. | |
| B. | Both assertion and reason are true and the reason is the correct explanation of the assertion |
| C. | Both assertion and reason are true but the reason is not a correct explanation of the assertion |
| Answer» D. | |
| 14. |
Woollen clothes keep the body warm, because woo? |
| A. | Is a bad conductor |
| B. | Increases the temperature of body |
| C. | Decreases the temperature |
| D. | Has no effect |
| Answer» B. Increases the temperature of body | |
| 15. |
On a cold morning, a metal surface will feel colder to touch than a wooden surface, because |
| A. | Metal has high specific heat |
| B. | Metal has high thermal conductivity |
| C. | Metal has low specific heat |
| D. | Metal has low thermal conductivity |
| Answer» C. Metal has low specific heat | |
| 16. |
At a common temperature, a block of wood and a block of metal feel equally cold or hot. The temperatures of block and wood are |
| A. | Equal to the temperature of the body |
| B. | Less than the temperature of the body |
| C. | Greater than the temperature of the body |
| D. | Has no change |
| Answer» B. Less than the temperature of the body | |
| 17. |
The sprinkling of water reduces slightly the temperature of a closed room because |
| A. | Temperature of water is less than that of the room |
| B. | Specific heat of water is high |
| C. | Water has large latent heat of vaporisation |
| D. | Water is a bad conductor of heat |
| Answer» D. Water is a bad conductor of heat | |
| 18. |
Heat current is maximum in which of the following? |
| A. | Copper |
| B. | Steel and copper |
| C. | Copper and steel |
| D. | Steel |
| Answer» B. Steel and copper | |
| 19. |
Which of the following is more close to a black body? |
| A. | Blackboard paint |
| B. | Green leaves |
| C. | Black holes |
| D. | Red roses |
| Answer» B. Green leaves | |
| 20. |
A pressure cooker reduces cooking time for food, because |
| A. | Heat is more evenly distributed in the cooking space |
| B. | The higher pressure inside the cooker crushes the food material |
| C. | Cooking involves chemical changes helped by a rise in temperature |
| D. | Boiling point of water involved in cooking is increased |
| Answer» E. | |
| 21. |
Clinical thermometer can be sterilized by boiling. |
| A. | True |
| B. | False |
| Answer» C. | |