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
Congratulations….
You have secured more than 70% to pass the test.
#1. _____ is a good radiator of heat.
#2. Poor conductor of heat is:
#3. Convection of heat is the process of heat transfer due to the:
#4. The thermal conductivity of copper in watt per meter per kelvin is:
#5. Rate of flow of heat through conductor is inversely proportional to its:
#6. What happens to the thermal conductivity of a wall if its thickness is doubled?
#7. The rate of flow of heat is:
#8. Which surface is bad emitter?
#9. Land breeze and sea breeze are the result of:
#10. Which of the following is a good radiator of heat?
#11. Warms clothes for winter season are:
#12. Thermal conductivity of water is:
#13. The surfaces of Leslie’s cube are:
#14. Radiation is the mode of transfer of heat from one place to another in the form of waves called:
#15. In liquids, heat is mainly transferred by:
#16. Rooms are heated using gas heaters by:
#17. In solids, heat is transferred by:
#18. Global warming is due to a gas:
#19. Metals are good good conductors of heat due to:
#20. The thermal conductivity of dry air is _____ W/mK.
#21. Thermal conductivity of brick is:
#22. The example of bad conductor is:
#23. Unit of rate of thermal energy is:
#24. The unit of rate of conduction of thermal energy is:
#25. Which of the following birds are expert thermal climbers?
#26. The unit of thermal conductivity is:
#27. Land breeze blows from
#28. The glider remains in air due to:
#29. In gases, heat is transferred by:
#30. Worst absorber of heat is:
#31. The thermal conductivity of dry air is _____ W/mK.
#32. False ceiling is done to:
#33. Thermal conductivity of ice is:
#34. Which colour is a good absorber?
