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A bimetal made of copper and iron strips...

A bimetal made of copper and iron strips welded together is straight at room tempera true. It is held vertically so that the iron strip is towards the left hand and copper strip is towards right hand. The bimetal strip is then heated. The bimetal strip

A

remains straight

B

bends towards right

C

bends towards left

D

does not change

Text Solution

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The correct Answer is:
To solve the problem regarding the behavior of a bimetal strip made of copper and iron when heated, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Composition**: - The bimetal strip consists of two different metals: copper and iron. - The iron strip is on the left side, and the copper strip is on the right side when held vertically. 2. **Identifying the Properties of the Metals**: - The coefficient of linear expansion for copper is greater than that of iron. This means that when both metals are heated, copper will expand more than iron. 3. **Heating the Bimetal Strip**: - When the bimetal strip is heated, both metals will expand, but copper will expand more than iron due to its higher coefficient of linear expansion. 4. **Resulting Shape Change**: - As the copper strip expands more, it will push against the iron strip. This differential expansion causes the bimetal strip to bend. - Since the copper is on the right and expands more, the strip will bend towards the left. 5. **Conclusion**: - Therefore, after heating, the bimetal strip will bend towards the left. ### Final Answer: The bimetal strip will bend towards the left. ---
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