### Physics 9 Chapter 8 - Thermal Properties of Matter -26

 1.    What is the coefficient of linear thermal expansion of brass?a) 1.9 x 10-5 b) 2.27 x 10-5c) 2.01 x 10-5d) 1.0 x 10-5
 2.    Most of the substances ....................on heating?a) Cool b) Contractc) Exploded) Expand
 3.    What is the coefficient of linear thermal expansion of copper?a) 2.27 x 10-5 b) 1.7 x 10-5c) 2.01 x 10-5d) 1.0 x 10-5
 4.    Most of the substances ....................on cooling?a) Explode b) Coolc) Expandd) Contract
 5.    What is the coefficient of linear thermal expansion of steel?a) 2.01 x 10-5 b) 2.27 x 10-5c) 1.2x 10-5d) 1.0 x 10-5
 6.    Which of the following is the result of thermal expansion?a) Increase in thickness of a substance b) All of thesec) Increase in lengthd) Increase in breadth
 7.    Which of the following relation is correct about change in length of solid, original length and change in temperature?a) ∆L ∞ Lo / ∆T b) ∆L ∞ Lo + ∆Tc) ∆L ∞ Lo - ∆Td) ∆L ∞ Lo ∆T
 8.    What is the coefficient of linear thermal expansion of gold?a) 1.3 x 10-5 b) 2.01x 10-5c) 2.27 x 10-5d) 1.0 x 10-5
 9.    Which of the following formula is correct about linear thermal expansion of solids?a) Formula: L = Lo (1 + α ∆T) b) Formula: L = Lo (1 - α ∆L)c) Formula: L = Lo (1 - α ∆T)d) Formula: L = Lo (1 + α ∆L)
 10.    What is the coefficient of linear thermal expansion of silver? a) 2.01 x 10-5 b) 1.93 x 10-5c) 1.0 x 10-5d) 2.27 x 10-5

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