Question

A platform resistance thermometer reads 0 C when its resistance is $80\Omega$ and 100C when its resistance is $90\Omega$. Find the temperature at the platinum scale at which the resistance is $86\Omega$

• A. 30C
• B. 60C
• C. 20C
• D. 10C

Answer 1

The correct option is B 60C

$R_t=86\Omega$ , $R_{0^{\circ }}=80\Omega$ ,$R_{{100}^{\circ }}=90\Omega$

t = $\frac{R_t-R_0}{R_{100}-R_0}\times 100$

=$\frac{86-80}{90-80}\times 100$

=${60}^{\circ }c$

Hence [B] option is correct