Two rods of different materials having coefficients of thermal expansion α1, α2 and Young's modulii Y1, Y2 respectively are fixed between two rigid massive walls. The rods are heated such that they undergo the same increase in temperature. There is no bending of the rods. If α1:α2=2:3 and thermal stresses developed in the two rods are equal, then Y1:Y2 is equal to

Two rods of different materials having coefficients of thermal expansi

1.	Two rods of different materials having coefficients of thermal expansion α1, α2 and Young's modulii Y1, Y2 respectively are fixed between two rigid massive walls. The rods are heated such that they undergo the same increase in temperature. There is no bending of the rods. If α1:α2=2:3 and thermal stresses developed in the two rods are equal, then Y1:Y2 is equal to
Answer» Two rods of different materials having coefficients of thermal expansion $α_{1}, α_{2}$ and Young's modulii $Y_{1}, Y_{2}$ respectively are fixed between two rigid massive walls. The rods are heated such that they undergo the same increase in temperature. There is no bending of the rods. If $α_{1} : α_{2} = 2 : 3$ and thermal stresses developed in the two rods are equal, then $Y_{1} : Y_{2}$ is equal to

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