Bimetallic strip A is made of copper and steel; bimetallic strip B is made of al

Question

Bimetallic strip A is made of copper and steel; bimetallic strip B is made of aluminum and steel. (a)Referring to table 16-1, which strip bends more for a given change in temperature?(b)Which of the metals listed in table 16-1 would give the greatest amount of bend when combined with steel in a bimetallic strip?

substance coefficient of thermal expansion near 20 C (alpaha)(K^-1)
lead 29 * 10^-6
aluminum 24 * 10^-6
brass 19 * 10^-6
copper 17 * 10^-6
iron (steel) 12 * 10^-6
concrete 12 * 10^-6
window glass 11 * 10^-6
pyrex glass 3.3 * 10^-6
quartz 0.50 * 10^-6

Explanation / Answer

Copper have less coefficient of thermal expansion than aluminium. So, aluminum and steel bimetallic strip bends more (b). Difference between coefficient of thermal expansion values of steel and lead is more than other meterial and steel. So, Answer is lead

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