When a metal bar is heated, the increase in length is greater, if :

the bar has large diameter

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the bar is long

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the temperature rise is small

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small diameter

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Solution

The correct option is B the bar is long
The change in length is directly proportional to the length of the rod, change in temperature and the coefficient of expansion

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When a metal bar is heated, the increase in length is greater, if :

The correct option is B the bar is longThe change in length is directly proportional to the length of the rod, change in temperature and the coefficient of expansion

The correct option is B the bar is long
The change in length is directly proportional to the length of the rod, change in temperature and the coefficient of expansion