Standard Science Primary 4 Energy

A bimetallic strip is made of Metal A and Metal B. When heated, the strip curves towards Metal A. This is because __________.

A Metal B expanded more than Metal A
B Metal A contracted while Metal B expanded
C Metal B is a better insulator
D Metal A expanded more than Metal B
Show Worked Solution

Worked Solution

Step 1: The strip curves away from the metal that expands more. Step 2: Curving towards Metal A means Metal B has become longer/longer outer arc. Step 3: Thus, Metal B expands more than Metal A.

Correct answer: Metal B expanded more than Metal A

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