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the coeffiecient of linear of a crystal in one dirn is a1 and that in every dirm perpendicuar a2 .the coefficient of cubical expansion is: a)a1+a2 b)2a1+a2 c)a1+2a2 d)none of these 2)it is a bimetallic strip is heated it will 1)bend toward the metal with lower thermel expansion coefficient 2)bend toward the metal with higher thermal expansion coefficient 3)twist itself into a helix 4)have no bending


the coeffiecient of linear of a crystal in one dirn is a1 and  that in every dirm perpendicuar a2 .the coefficient of cubical expansion is:


a)a1+a2          b)2a1+a2   c)a1+2a2          d)none of these


 


2)it is a bimetallic strip is heated it will


1)bend toward the metal with lower thermel expansion coefficient


2)bend toward the metal with higher thermal expansion coefficient


3)twist itself into a helix


4)have no bending                                                                                               


Grade:10

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