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