Two rods of same material but of radius 'r' and 2r
fixed between two supports and the temperature is
raised by T°C. The ratio of thermal stress developed
in them is
(1) 1:2
(2) 1:1
(3) 1:4
(4) 4:1
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Two rods identical in geometry but of different materials having coefficient of thermal expansion and Youngs moduli respectively are fixed between two rigid massive walls. The rods are heated such that they undergo the same increase in temperature. There is no bending of the rods If = 2 : 6, the thermal stresses developed in the two rods are equal provided is equal to
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