A scale $(α = 10^{- 3 / 0} C)$ gives correct reading at $0^{0} C$ . It is used at a different temperature $15^{0} C$ . The scale is used to measure length of 1m. If the value of the difference in the measured length and the actual length is 3x mm then x is

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Solution

The correct option is B 5
According to Linear Expansion ,
$Δ L = L α Δ t$
$Δ L = 1 \times 10^{- 3} \times 15$
$Δ L = 15 m m$
$3 x = 15 m m$
$x = 5 m m$

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A scale (α=10−3/0C) gives correct reading at 00C. It is used at a different temperature 150C. The scale is used to measure length of 1m. If the value of the difference in the measured length and the actual length is 3x mm then x is

The correct option is B 5According to Linear Expansion ,ΔL=LαΔtΔL=1×10−3×15ΔL=15mm3x=15mmx=5mm

A scale $(α = 10^{- 3 / 0} C)$ gives correct reading at $0^{0} C$ . It is used at a different temperature $15^{0} C$ . The scale is used to measure length of 1m. If the value of the difference in the measured length and the actual length is 3x mm then x is

The correct option is B 5
According to Linear Expansion ,
$Δ L = L α Δ t$
$Δ L = 1 \times 10^{- 3} \times 15$
$Δ L = 15 m m$
$3 x = 15 m m$
$x = 5 m m$