Questions

# If a scale is made up of a material at temp ${t}_{1}^{0}C$  if temperature is changed to ${{t}_{2}}^{0}C$$\left({t}_{2}<{t}_{1}\right)$ then( coefficient of linear expansion is positive)

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By Expert Faculty of Sri Chaitanya
a
measuring length > actual length
b
measuring length = actual length
c
measuring length < actual length
d
all the above
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detailed solution

Correct option is A

coefficient of linear expansion is positive then , scale shrinks, hence the length shown on scale will be greater than actual length

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A metal meter scale gives correct measurement at  ${40}^{0}C$  it is generally used at a temperature of ${0}^{0}C$ . Find the correction to be made for every meter  $\left(\alpha ={10}^{-6}{/}^{0}C\right)$

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