Q. A bimetallic strip bends when heated because the metals have __________.
गर्म करने पर एक द्विधात्विक पट्टी मुड़ जाती है क्योंकि धातुओं में __________ होता है।
Explanation
When heated, each metal in a bimetallic strip expands differently because they have different coefficients of thermal expansion. This causes the strip to curve toward the side with the lower expansion rate, producing mechanical motion based on temperature changes.
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