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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 :
(1) 5 × 103 N
(2) 50 × 103 N
(3) 100 × 103 N
(4) 2 × 103 N
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