Question

The resistance of a resistor 8.4 ohm at 303 K increases to 9.2 ohm when the temp is increased to
348 K.Calculate the value of its resistance at 273 K.​

Answer 1

Answer:

Using the relation :

R

2

=R

1

[1+α(T

2

−T

1

]

Here,

R

1

=10.5Ω ; T

1

=21

∘

C

R

2

=16.4Ω; T

2

=147

∘

C

Putting the values in the equation,

16.4=10.5[1+α(147−21)]

Therefore,

α=4.45×10

−3

C

−1