Punjab 9th Class Physics Chapter 9 Transfer of Heat Mcqs Test Online Physics Chapter 9 Transfer of Heat Mcqs Test Online Punjab 9th Class 123456789 Question 1 of 9Physics 1. In solids, heat is transferred by: Radiation Absorption Conduction Convection Question 1 of 9Question 2 of 9 2. Metals are good conductors of heat due to the: Big size of their molecules Free electrons Rapid vibrations of their atoms Small size of their molecules Question 2 of 9Question 3 of 9 3. Rooms are heated using gas heaters by: Radiation only Conduction only Convection only Convection and radiation Question 3 of 9Question 4 of 9 4. What happens to the thermal conductivity of a wall if its thickness is doubled? Becomes double Becomes half Remains the same Becomes one fourthQuestion 4 of 9Question 5 of 9 5. Which of the following is a good radiator of heat? A dull black surface A green coloured surfaceA white surface A shining silvered surface Question 5 of 9Question 6 of 9 6. Land breeze blows from Sea to land during the day Land to sea during the day Sea to land during night Land to sea during night Question 6 of 9Question 7 of 9 7. Convection of heat is the process of heat transfer due to the: Upward movement of molecules Downward movement of molecules Random motion of molecules Free movement of molecules Question 7 of 9Question 8 of 9 8. In gases, heat is mainly transferred by RadiationConvection Molecular collision Conduction Question 8 of 9Question 9 of 9 9. False ceiling is done to: Cool the room Keep the roof clean Lower the height of ceiling Insulate the ceilingQuestion 9 of 9 Loading... Test By Subject Punjab Test By Topics 9th Class Physics You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.