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