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A scale made of material having coefficient of linear expansion αs  at  tiC. If  temperature is changed to t2t2>t1 then error in measurement of scale is

a
ΔL=LαSΔt
b
ΔL=1LαSΔt
c
ΔL=LαsΔt
d
L=ΔLΔtα

detailed solution

Correct option is C

coefficient of linear expansion is αs=∆LL∆temperature ⇒∆L=αsL∆t here L is initial length of scale ∆L is change in length of scale  ∆t is change in temperature

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