Question

If the resistance of a conductor is 95 ohms at 23 degrees C and 115 ohms at 71 degrees C, what is its temperature coefficient of resistivity

Answer 1

226 Per/ deg c

Step-by-step explanation:

We know that

`Rt = R1 *(1 + T1 * DT)`

Here

R1 = Resistance at the room temperature = 95 ohms

Rt= Resistance of the final temperature = 115 ohms

T1 = Temperature coefficient

Putting these value in the previous equation we get

`115 = 95 *(1 + T1 * (71-23))`

`115=95*(1+48T1)`

`115=95 +4560T1`

`20=4520T1`

`T1=(4520)/(20)`

T1=226 per Deg C