JEE Main 2026 (4 Apr, Shift 2) Physics Q34: The…

Question

The temperature of a metal strip having coefficient of linear expansion $\alpha$ is increased from $T_1$ to $T_2$ resulting in increase of its length by $\Delta L_1$. The temperature is further increased from $T_2$ to $T_3$ such that the increase in its length is $\Delta L_2$.
Given $T_3+T_1=2T_2$ and $T_2-T_1=\Delta T$, the value of $\Delta L_2$ is ________.

Accepted Answer

Option 4: $\Delta L_1\left[1+\alpha\Delta T\right]$

Answer

$\Delta L_1\left[1+2\alpha^2(\Delta T)^2\right]$

Answer

$\Delta L_1\left[1+\alpha^2(\Delta T)^2\right]$

Answer

$\Delta L_1\left[1+2\alpha\Delta T\right]$

Answer

$\Delta L_1\left[1+\alpha\Delta T\right]$

JEE Main 4 April 2026, Shift 2, Physics Q34

Same idea in other shifts