Question

when a body is heated the maximum rise will be in its 1) length 2)surface area 3)volume 4) density​

Answer 1

Answer Is : Volume

Explanation:

⇒When a solid metallic sphere is heated,  its diameter , surface area and volume will increases.

⇒As we know that density=mass/volume

⇒Here mass of the solid sphere remains unchanged . So its density decreases.

⇒Hence the  percentage increase in its volume is greater because Coefficient of Volume expansion is greater than coefficient of area expansion and Linear expansion.

Answer 2

Answer:

The rise will be maximum in the volume .

Explanation:

We need to find in which the rise is maximum when they are heated .

The options are 1 ) length 2 ) surface area 3 ) volume 4 ) density .

We know , expansion in length, area and volume due to increase in temperature is ( In same material ) :

$\Delta l=\alpha\Delta T\\\Delta A=2\alpha\Delta T\\\Delta V=3\alpha\Delta T$

Here , we can see that for same amount of increase temperature .

Increase in volume will be maximum .

Now , we know density is inversaly proportional to volume therefore it will decrease as the temperature increase .

Hence , this is the required solution .

Learn More :

Expansion

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