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. Thermal conductivity of water is:

#2. Warms clothes for winter season are:

#3. Land breeze and sea breeze are the result of:

#4. Poor conductor of heat is:

#5. In gases, heat is transferred by:

#6. Which surface is bad emitter?

#7. The glider remains in air due to:

#8. The unit of thermal conductivity is:

#9. Rooms are heated using gas heaters by:

#10. Unit of rate of thermal energy is:

#11. The thermal conductivity of dry air is _____ W/mK.

#12. In liquids, heat is mainly transferred by:

#13. Rate of flow of heat through conductor is inversely proportional to its:

#14. Which of the following is a good radiator of heat?

#15. The rate of flow of heat is:

#16. Global warming is due to a gas:

#17. Land breeze blows from

#18. Thermal conductivity of brick is:

#19. The example of bad conductor is:

#20. Convection of heat is the process of heat transfer due to the:

#21. In solids, heat is transferred by:

#22. Radiation is the mode of transfer of heat from one place to another in the form of waves called:

#23. Metals are good good conductors of heat due to:

#24. The unit of rate of conduction of thermal energy is:

#25. The thermal conductivity of copper in watt per meter per kelvin is:

#26. What happens to the thermal conductivity of a wall if its thickness is doubled?

#27. Which of the following birds are expert thermal climbers?

#28. _____ is a good radiator of heat.

#29. The surfaces of Leslie’s cube are:

#30. Worst absorber of heat is:

#31. Which colour is a good absorber?

#32. False ceiling is done to:

#33. Thermal conductivity of ice is:

#34. The thermal conductivity of dry air is _____ W/mK.

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