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