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John Bhargava
Asked: 2022-11-08T20:11:26+05:30 In:

A bar of iron is 10 cm at `20^(@)C`. At `19^(@)C` it will be (`alpha` of iron `=11xx10.//^(@)C`)
A. `11xx10` cm longer
B. `11xx10` cm shorter
C. `11xx10` cm shorter
D. `11xx10` cm longer

A bar of iron is 10 cm at `20^(@)C`. At `19^(@)C` it will be (`alpha` of iron `=11xx10.//^(@)C`)
A. `11xx10` cm longer
B. `11xx10` cm shorter
C. `11xx10` cm shorter
D. `11xx10` cm longer
Parabola
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  1. Correct Answer – C

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Kalpana Qabool Sridhar
Asked: 2022-10-29T00:32:01+05:30 In:

A bar of iron is 10 cm at `20^(@)C`. At `19^(@)C` it will be (`alpha` of iron `=11xx10.//^(@)C`)
A. `11xx10^(-6)` cm longer
B. `11xx10^(-6)` cm shorter
C. `11xx10^(-5)` cm shorte
D. `11xx10^(-5)` cm longer

A bar of iron is 10 cm at `20^(@)C`. At `19^(@)C` it will be (`alpha` of iron `=11xx10.//^(@)C`)
A. `11xx10^(-6)` cm longer
B. `11xx10^(-6)` cm shorter
C. `11xx10^(-5)` cm shorte
D. `11xx10^(-5)` cm longer
Parabola
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1 Answer

  1. Correct Answer – C
    Chane is length, `Deltal=l_(o)alphaDeltaT=10xx11xx10^(-6)(19-20)`
    `” “=-11xx10^(-5)` cm

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