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