When the temperature of a strip of iron is increased, the length of the strip:
(a) also increases.
(b) actually decreases.
(c) may increase and may decrease.
(d) decreases in width as it gets longer.
Thermal expansion refers to the expansion due to change in temperature. There are three possible categories of thermal expansion namely linear expansion, area expansion and volume expansion.
Answer and Explanation:
Answer : (a) also increases
With the increase in temperature, there is a linear expansion of the strip of iron.
Therefore, there is an increase in length of the strip.
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Learn more about this topic:
from UExcel Physics: Study Guide & Test PrepChapter 11 / Lesson 8