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UPSC 1999: Strips of two metals A and B are firmly joined together as shown in the figure. On heating, A expands more than B does. If this joined strip is heated, then it will appear as:
(a)As shown in figure (a)
(b)As shown in figure (b)
(c)As shown in figure (c)
(d)As shown in figure (d)
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Not attemptedCorrect Answer: (b) As shown in figure (b)
When heated, metal A (with the larger coefficient of linear expansion) lengthens more than metal B, so the composite bends with A on the outer (longer) side and becomes convex towards metal B; it will not remain straight, twist, or bend the other way. ([licchavilyceum.com](https://licchavilyceum.com/upsc-civil-services-prelims-1999-solved-question-paper/))
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Frequently Asked Questions
What is the correct answer to this UPSC 1999 Science & Technology question?▼
The correct answer is option (b): As shown in figure (b). Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1999, GS Paper 1, as Question 120. It falls under Science & Technology > Physics.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Physics?▼
UPSC has asked 104 questions from Physics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.