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.

\(\frac{/ - /_o}{/(1 + \Delta t)}\)

View answer & explanation

Correct answer is B

\(\frac{L - L_o}{L_o \Delta t}\)

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