Al-Huda Science Academy has designed Physics Chapter 9 Class 9 MCQs for board preparation. Most of the questions are from the previous board papers. These are helping material for all type of students. Must share to your fellows if helpful.
Time allocated to each question is 20 seconds.
Physics Chapter 9 Class 9 MCQs
Results
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#1. _____ is a good radiator of heat.
#2. The thermal conductivity of dry air is _____ W/mK.
#3. The rate of flow of heat is:
#4. Which of the following birds are expert thermal climbers?
#5. Convection of heat is the process of heat transfer due to the:
#6. Thermal conductivity of brick is:
#7. Thermal conductivity of ice is:
#8. The glider remains in air due to:
#9. Which surface is bad emitter?
#10. The unit of rate of conduction of thermal energy is:
#11. Thermal conductivity of water is:
#12. Land breeze and sea breeze are the result of:
#13. Global warming is due to a gas:
#14. Poor conductor of heat is:
#15. Land breeze blows from
#16. The unit of thermal conductivity is:
#17. Unit of rate of thermal energy is:
#18. What happens to the thermal conductivity of a wall if its thickness is doubled?
#19. In solids, heat is transferred by:
#20. Worst absorber of heat is:
#21. The example of bad conductor is:
#22. Which colour is a good absorber?
#23. Warms clothes for winter season are:
#24. The thermal conductivity of copper in watt per meter per kelvin is:
#25. Radiation is the mode of transfer of heat from one place to another in the form of waves called:
#26. The thermal conductivity of dry air is _____ W/mK.
#27. Which of the following is a good radiator of heat?
#28. The surfaces of Leslie’s cube are:
#29. Rooms are heated using gas heaters by:
#30. In liquids, heat is mainly transferred by:
#31. False ceiling is done to:
#32. Metals are good good conductors of heat due to:
#33. In gases, heat is transferred by:
#34. Rate of flow of heat through conductor is inversely proportional to its:
