A bar of iron is 10 cm at 20°C. At 19°C it will be (a of iron = 11 x 10^-6/°C)

11 x 10^-6 cm longer

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11 x 10^-6 cm shorter

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11 x 10^-5 cm shorter

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11 x 10^-5 cm longer

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Solution

The correct option is C
11 x 10^-5 cm shorter

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