Questions
A thin brass sheet at 20°C and a thin steel sheet at 30°C have the same surface area. The common temperature at which both would have the same area is (Coefficient of linear expansion for brass and steel are respectively, 19 × 10–6/°C are 11 × 10–6/°C)
detailed solution
Correct option is B
A2brass =A2steel A1br1+bBr(t−20)=A1st1+bSt(t−30) Given A1br=A1stTalk to our academic expert!
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A thin copper wire of length L increases in length by 1% when heated from 0°C to 100°C . If a thin copper plate of area 2L2 is heated from 0oC to 50°C , the percentage increase in its area will be
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