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