MHT CET202415 May 2024Morning ShiftPhysicsThermal Properties of MatterActual
A sheet of steel is 40 cm long and 5 cm broad at 0^ C . The surface area of the sheet increases by 1.4 ~cm ^2 at 100^ C . Coefficient of linear expansion of steel is
Options
- A1.9 10⁻⁵ / ^ C
- B2.4 10⁻⁵ /^ C
- C3.5 10⁻⁵ / ^ C
- D7 10⁻⁵ / ^ C
Correct answer
C. 3.5 10⁻⁵ / ^ C
Step-by-step solution
aligned & = A ₂- A ₁ ~A ₁ ~T & = 1.4 40 5 100 = 14 10⁻⁴ 20 =7 10⁻⁵ / ^ C & = 2 = 7 10⁻⁵ 2 =3.5 10⁻⁵ / ^ C aligned