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  1. A steel rod, 100 mm long is held between two rigid supports. It is heated by 20°C. If the coefficient of thermal expansion of the material of the rod is 15 x 10-6 /° C and modulus of elasticity is 200 x 103 MN/m2, what is the stress in the rod ?

    2. A.
    20 MN/m2
    B.
    40 MN/m2
    C.
    60 MN/m2
    D.
    80 MN/m2

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    Answer : Option C

    Explanation :

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