Advanced Science Primary 4 Energy

A bimetallic strip is made of Metal X and Metal Y bonded together. When heated, the strip curves towards Metal X. This means that __________.

A Metal X expands more than Metal Y
B Metal Y expands more than Metal X
C Metal X contracts more than Metal Y
D Metal Y is a better conductor than Metal X
Show Worked Solution

Worked Solution

Step 1: When heated, both metals expand. Step [2-9]: The metal that expands more becomes longer and pushes the strip to curve towards the shorter side. Step [2-9]: Since it curves towards X, Y must have expanded more.

Correct answer: Metal Y expands more than Metal X

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