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A wire of length 100cm increases in length by 10^-2 m when it is heated through 100°C. The coefficient of linear expansion of the material of the wire expressed in /K units is

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$1 \times 10^{- 6}$

$1 \times 10^{4}$

$1 \times 10^{- 4}$

$10^{- 2}$

answer is B.

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Detailed Solution

$α = \frac{∆ L}{L_{0} (∆ T)} = \frac{1}{100 \times 100} = 1 \times 10^{- 4} K^{- 1}$

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