Answer
(a) strip B
(b) steel-lead bimetallic strip
Work Step by Step
(a) We know that the amount of bend in a bimetallic strip depends on the difference in the coefficients of thermal expansion. We also know that the greater the difference in thermal expansion, the greater the bend and hence strip B (aluminum-steel) bends more than strip A (copper-steel).
(b) We know that the steel-lead bimetallic strip will give the greatest amount of bend for the metal in the table.
