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