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