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