Two different wires having lengths L₁ and L₂, and respective temperature coefficient of linear expansion α ₁ and α ₂, are joined end-to-end. Then the effective temperature coefficient of linear expansion is:

(D) (α ₁L₁ + α ₂L₂)/(L₁ + L₂)

(B) 4(α ₁α ₂)/(α ₁ + α ₂)L₂L₁/((L₂ + L₁)²)

Properties of Solids and Liquids: JEE Main 2020 Physics question

JEE Main 2020 · 5 Sep, Evening shift · Q7518

JEE Main 20205 Sep, Evening shiftPhysicsMediumProperties of Solids and Liquids184× since 2002

Two different wires having lengths L₁ and L₂, and respective temperature coefficient of linear expansion

\alpha

₁ and

\alpha

₂, are joined end-to-end. Then the effective temperature coefficient of linear expansion is :

JEE Main 2020 Properties of Solids and Liquids Question with Solution (5 Sep Evening shift, Q7518) | JEE Arc

JEE Main 2020 · 5 Sep, Evening shift · Q7518

JEE Main 20205 Sep, Evening shiftPhysicsMediumProperties of Solids and Liquids184× since 2002

Two different wires having lengths L₁ and L₂, and respective temperature coefficient of linear expansion

\alpha

₁ and

\alpha

₂, are joined end-to-end. Then the effective temperature coefficient of linear expansion is :