Question

When a bimetallic bar made of copper and iron strips is heated, the bar bends
toward the iron strip. The reason for this is
A. Iron gets hotter before copper.
B. Copper gets hotter before iron.
C. Copper expands more than iron.
D. Iron expands more than copper.


only the answer then you are brainliest

Answer 1

Answer:

iron gets hotter before copper

Answer 2

Question: When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. The reason for this is

A. Iron gets hotter before copper.    

B. Copper gets hotter before iron.

C. Copper gets hotter before iron.

D. Iron expands more than copper.

Solution: C. Copper expands more than iron.

Explanation: The alarm contains two metal strips, one of iron and the other of copper, firmly bolted together. Copper expands more than iron. Therefore this bimetallic strip gets heated because of fire, it bends on the side of iron.