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
\(\frac{/ - /_o}{/(1 + \Delta t)}\)
Verified Correct Answer: B.
Physical Principles & Numerical Solution
\(\frac{L - L_o}{L_o \Delta t}\)
Source: Myschool Past Questions Archive (Record #28240)