Questions
When a rod is healed but prevented from expanding, the stress developed is independent of
a
material of the rod
b
rise in temperature
c
length of rod
d
none
detailed solution
Correct option is C
lt=l0(1+αt)The extension in length is given by 1=lt−l0=l0αtIf the same rod of length 1o is subjected to stress along its length, then extension in length can be calculated by Hooke's law.Y= stress strain = stress l/l0=l0 stress l∴ l=l0 stress Y ....(2)If the rod is prevented by expanding, we have l0αt=l0 stress Y∴Stress = Y α t (independent of Io)Talk to our academic expert!
Similar Questions
A steel rod of length 5 m is fixed rigidly between two supports. of steel , With the increase in its temperature by . the stress developed in the rod is
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