Punjab 9th Class Physics Model Paper 7 MCQs Test Online Punjab 9th Class Physics Model Paper 7 MCQs Test Online 123456789101112131415161718192021222324252627282930313233343536Show paginator Hide paginator Question 1 of 36Physics 1. Which process produces cooling effect? 1. boiling 2. evaporation3.condensation 4.freezing Question 1 of 36Question 2 of 36 2. In symbols, co-efficient of volume expansion is defined as:1.β= ∆V/∆T 2. β= ∆T/∆V3.β= ∆V/V₀∆T 4. β= ∆T/V₀∆V Question 2 of 36Question 3 of 36 3. False ceiling is done to:1. insulate the ceiling 2.cool the room 3. lower the height of ceiling 4. keep the roof clean Question 3 of 36Question 4 of 36 4. Which gas is used in spite of Freon gas in refrigerator? 1.H₂ 2.CO₂ 3.N₂4.NH₃ Question 4 of 36Question 5 of 36 5. Which surface is best reflector of heat?1.white surface 2.coloured surface 3.dull black surface 4.shining silvered surface Question 5 of 36Question 6 of 36 6. Celsius temperature is converted into Fahrenheit temperature using the formula:1.F = 1.8 C – 32 2.F = 1.4 C – 32 3.F = 1.8 C + 32 4.F = 1.4 C + 32 Question 6 of 36Question 7 of 36 7. Thermal conductivity of rubber is _________ Wm⁻¹K⁻¹.1. 400 2. 4303.245 4. 105 Question 7 of 36Question 8 of 36 8. The ways by which transfer of heat takes place are: 1. 2 2.33.1 4. 4 Question 8 of 36Question 9 of 36 9. What happens to the thermal conductivity of a wall if its thickness is doubled?1.becomes double 2.remains the same 3.becomes half 4. becomes one fourth Question 9 of 36Question 10 of 36 10. Temperature of ice in freezer is:1.0 °C 2.– 18°C 3.– 28°C4.– 8°C Question 10 of 36Question 11 of 36 11. Length of a rod is L₀ on temperature T₀. After heating up to temperature T, its length L becomes: 1.L = L₀(1 + ∆T)2.L = L₀(1 – ∆T)3.L = L₀(1 + α∆T) 4.L = L₀(1 – α∆T) Question 11 of 36Question 12 of 36 12. Rooms are heated using gas heaters by: 1. convection and radiation2. radiation only 3. convection only4.conduction only both Question 12 of 36Question 13 of 36 13. In gases, heat is mainly transferred by:1.conduction 2. radiation 3. molecular collision 4. convection Question 13 of 36Question 14 of 36 14. If a liquid of mass ‘m’ requires thermal energy ‘∆Qv’ to completely change into gas at its boiling point without any change in its temperature, then its latent heat of vaporization can be calculated as following: 1.Hv = ∆Qv/m2.Hv=cm∆Qv 3.Hv = m/∆Qv 4.Hv = m∆Qv Question 14 of 36Question 15 of 36 15. The specific heat of water is:1.2500 Jkg⁻¹ K⁻¹ 2.2100 Jkg⁻¹ K⁻¹ 3.2010 Jkg⁻¹ K⁻¹4.4200 Jkg⁻¹ K⁻¹ Question 15 of 36Question 16 of 36 16. Bimetallic strip works on the principle of:1.expansion of metals 2. both A and B 3. unequal expansion of metals4. contraction of metals Question 16 of 36Question 17 of 36 17. Latent heat of fusion of 1 kg of ace at 0°C is: 1.3.36 x 10⁵Jkg⁻¹2.336 x 10⁵Jkg⁻¹3.33.6 x 10⁵Jkg⁻¹ 4.3.36 x 10³Jkg⁻¹ Question 17 of 36Question 18 of 36 18. In solids, heat is transferred by:1.conduction 2.absorption 3.convection 4.radiation Question 18 of 36Question 19 of 36 19. Complete the equation T(K) = ___________. 1.273 + C 2.273 – C3.273 + F 4.273 – FQuestion 19 of 36Question 20 of 36 20. Specific heat of water is how many times greater than that of dry soil? 1.two times 2.five times 3.three times 4.four times Question 20 of 36Question 21 of 36 21. Mercury is used as thermometric material because it has: 1.small heat capacity 2.all the given properties3.uniform thermal expansion 4.low freezing point Question 21 of 36Question 22 of 36 22. Which of the following effects evaporation? 1.surface area of the liquid 2.temperature 3.air 4.all of theseQuestion 22 of 36Question 23 of 36 23. If the mass of a body is ‘m’ and change in its temperature is ∆T, then the heat absorbed or released is given by: 1.∆Q = 2c∆T 2.∆Q = cm∆T²3.∆Q = m∆T 4.∆Q = cm∆T Question 23 of 36Question 24 of 36 24. Absolute zero is equal to: 1.100 °C 2.0°C 3.100 K 4.– 273°CQuestion 24 of 36Question 25 of 36 25. Normal human body temperature is: 1.37°F 2.15°F 3.38°F 4.98.6°FQuestion 25 of 36Question 26 of 36 26. Example of a bad conductor is: 1. iron 2. wool 3. gold4. graphiteQuestion 26 of 36Question 27 of 36 27. On Celsius scale, 50°C is equal on Fahrenheit scale to: 1.102°F 2.100°F 3.122°F 4.90°FQuestion 27 of 36Question 28 of 36 28. Heat transfers through fluids by the method called:1.convection 2. radiation 3.conduction 4. absorption Question 28 of 36Question 29 of 36 29. The specific heat of water is: 1.4200 Jkg⁻¹K⁻¹ 2.1760Jkg⁻¹K⁻¹3.2500 Jkg⁻¹K⁻¹ 4.800 Jkg⁻¹ K⁻¹ Question 29 of 36Question 30 of 36 30. Water freezer at: 1.0K2.-273K 3. 0°F 4.32°F Question 30 of 36Question 31 of 36 31. Thermal conductivity of silver is:1. 1.7 Wm⁻¹K⁻¹ 2. 0.59 Wm⁻¹K⁻¹3. 0.08 Wm⁻¹K⁻¹ 4.0.2 Wm⁻¹K⁻¹ Question 31 of 36Question 32 of 36 32. Reason of glider to remain in air is:1.radiation 2.convection 3.conduction 4.power Question 32 of 36Question 33 of 36 33. If ‘m’ and change in its specific heat, then its heat capacity is given by: 1.mc²2.m/c 3.mc 4.c/m Question 33 of 36Question 34 of 36 34. Specific heat of iron in joules per kilogram per Kelvin is: 1.903.02.920.0 3.387.0 4.470.0 Question 34 of 36Question 35 of 36 35. Unit of specific heat capacity in SI system is: 1.J⁻¹kg⁻¹ K⁻¹ 2.JkgK 3.JkgK⁻¹4.Jkg⁻¹ K⁻¹ Question 35 of 36Question 36 of 36 36. Which of the following material has large specific heat? 1.ice 2.mercury3.Copper 4.water Question 36 of 36 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.