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Grade: 12th pass
        
If an iron ray has a length of 100m when the temperature is 10°c by how much will it expand when the temperature rises to 30°c. Take linear expansivity of iron as 0.000012/degree celcius
one month ago

Answers : (2)

Meep
13 Points
							
L2=L1(1+ coefficient of linear expansion(t2-t1)) 
=100*(1+0.000012(30-10))
=100.024
Thus, it expands by L2-L1 metres = 0.024m
 
 
25 days ago
Rajdeep
227 Points
							
HELLO THERE!
Let’s collect the given data first.
Here’s what we are given:
 
Length of the iron rod (L) = 100m
Coefficient of linear expansion (\alpha) = 1.2\times 10^{-5}
Rise in temperature = 20 K
 
Now,
\triangle L = L \alpha \triangle T = 100 \times 1.2 \times 10^{-5} \times 20 \\= 2.4 \times 10^{-2} m
 
THANKS!
25 days ago
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