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 these2)it is a bimetallic strip is heated it will1)bend toward the metal with lower thermel expansion coefficient2)bend toward themetal with higher thermal expansion coefficient3)twist itself into a helix4)have no bending

Navjyot Kalra , 11 Years ago

Grade 10