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