NEET UG PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

1 Hard

1 of 1

Application +4 | -1

A brass rod of length 500 mm and diameter 3 mm is joined to a steel rod of same length and diameter at

{50^0}C

. If the coefficients of linear expansion of brass and steel are

2.5 \times {10^{ - 5}}^0{C^{ - 1}}

and

1.25 \times {10^{ - 5}}^0{C^{ - 1}}

then change in length of the combined rod at

{200^0}C

View answer and explanation

Correct option: B

2.8mm

Option B (2.8mm) is correct because the change in length is calculated by summing the expansions of both brass and steel rods.

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