A bar of initial length /0 is heated through a temperature change \(\Delta\)t to a new length I. The linear expansivity, a, of the bar is
a
\(\frac{/ - /_o}{/ \Delta t}\)
b
\(\frac{/ - /_o}{/_o \Delta t}\)
c
/o(1 + \(\Delta\) t)
d
\(\frac{/ - /_o}{/(1 + \Delta t)}\)
Explanation
Correct Option
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