PHY · PHY-2024-CT3-042भौतिकी (Physics)खंड B
A metallic bar of Young’s modulus, 0.5 ×10¹¹ N m⁻² and coefficient of linear thermal expansion 10⁻⁵ °C⁻¹, length 1 m and area of cross-section 10⁻³ m² is heated from 0°C to 100°C without expansion or bending. The compressive force developed in it is