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