A bar of initial length / 0 is heated through a temperature change \(\Delta\)t to
PHYSICS
JAMB 1990
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. \(\frac{/ - /_o}{/(1 + \Delta t)}\)
Correct Answer: B. \(\frac{/ - /_o}{/_o \Delta t}\)
Explanation
\(\frac{L - L_o}{L_o \Delta t}\)
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