Question

bt ( y_{1}=2 y, quad alpha_{1}=frac{2 y}{3} )
[
y_{2}=3 y quad alpha_{2}=frac{3 y^{3}}{3}
]
If ( =L_{1}=4 x )
[
begin{array}{c}
L_{2}=3 x
Delta L_{1}=L_{1} alpha_{1} Delta t=4 x times frac{2 y}{3} Delta T
Delta L_{2}=4 alpha_{2} Delta T=3 x times frac{3 y}{3} Delta T
end{array}
]
( frac{Delta L_{1}}{Delta L_{2}}=frac{8left(x^{x y} yright)^{2}}{frac{9 x y^{3} Delta 7}{x}}=8: 9 )
Ans

# two rods is 4:3 14. The ratio of the lengths of two rods The ratio of their coefficients of cu 'expansion is 2:3. Then the ratio of their li 'expansions when they are heated throne same temperature difference is 1) 2:1 2) 1:2 3) 8:9 4) 9:8

Solution