### Physics 9 Chapter 8 - Thermal Properties of Matter -30 1.    Which of the following formula is correct about ‘β’? a) Formula: β = ∆V x (Vo ∆T) b) Formula: β = ∆T x (Vo ∆V) c) Formula: β = ∆T / (Vo ∆V) d) Formula: β = ∆V / (Vo ∆T) 2.    What is coefficient of volume thermal expansion of mercury? a) 2.1 x 10-5 b) 36.6 x 10-5 c) 0.2 x 10-5 d) 18 x 10-5 3.    What is coefficient of volume thermal expansion of water? a) 0.2 x 10-5 b) 36.6 x 10-5 c) 2.1 x 10-5 d) 21 x 10-5 4.    What is the fractional increase in volume of a substance per Kelvin rise in temperature? a) Coefficient of linear thermal expansion of liquids b) Coefficient of volume thermal expansion c) Coefficient of quadratic thermal expansion d) Coefficient of linear thermal expansion of solids 5.    Which of the following relation is correct between coefficients of linear thermal expansion and volume thermal expansion? a) Relation: β = 3α b) Relation: β = 3 + α c) Relation: β = 3 - α d) Relation: β = 3 / α 6. What will be the value of β for the solid for which α has a value of 2 x 10-5 K-1? a) 8 x 10-5 K-1 b) 8 x 10-15 K-1 c) 2 x 10-5 K-1 d) 6 x 10-5 K-1 7. Find the volume of a brass cube at 100oC whose side is 10cm at 0oC. (Coefficient of linear thermal expansion of brass = 1.9 x 10-5 K-1)? a) 1.0057 x 10-3 b) 5.7 x 10-3 c) 0.001 d) 1.057 x 10-3 8.    Bridges made of steel girders ..................... on day? a) Explode b) Contract c) No effect d) Expand 9.    At which time, bridges made of steel girders expand? a) At night b) At after noon c) At noon d) At day 10.    Bridges made of steel girders ..................... at night? a) No effect b) Expand c) Explode d) Contract

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