Question

what will be the change in length of an iron rod of length. if the temperature is raised by 50 degree Celsius​

Answer 1

Answer:

We have the length of the iron rod at 100

o

C as

L

1

=50[1+12×10

−6

×80]=50.048cm

and the length of the aluminium rod will be

L

2

=100[1+24×10

−6

×80]=100.192cm

Thus we get the length of the composite system as:

50.048+100.192=150.24cm

At 20

o

C the length of the composite system is 150cm.

Thus we get,

α=

150×(100−20)

0.24

=20×10

−6

/

o

C