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Properties of Matter Booster Set udit Gupta
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Question 1 Three rods of equal length are joined to form an equilateral triangle ABC. D is the midpoint of AB. The coefficient of line ar expansion is for AB and 2 for AC and BC. If the distance DC remains constant for small changes in temperature: (b) 2 2 1 2 2
Answer1 DC VBC2 - DB2 0 (2BCABC- 2DBADB) 1 2- 4 Correct option is (c).
Question 2 Two rods, one of aluminium and the other made of steel, having initial lengths 11 and 12 are connected together to form a single rod of length l1 + 12. The coefficients of linear expansion for aluminium and steel are , and s, respectively. If the length of each rod increases by the same amount when their temperatures are raised by t c, then find the ratio 1+2
Answer 2 The length of each rod increases by the same amount. 22+15+1 1 1 T 2 Correct option is (d)
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