BIMETAL STRIP
THERMAL EXPANSION AT WORK
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Brass + Iron: Heat It
ALARM!
iron
brass
temperature
Brass > Iron
expands more
Fire alarm
thermostat
1. Thermal Expansion
Things expand when heated
Brass expands more than iron
2. Bimetal Strip
Two metals joined · bends when heated
The metal that expands more (brass) is on the outside
3. Uses
Fire alarm, thermostat,
electric iron
MATRIC PHYSICS · THERMAL PROPERTIES · PUNJAB BOARDS
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