10.3 The electrical resistance in ohms of a certain thermometer varies with…

PHYSICS · Subjective · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

10.3 The electrical resistance in ohms of a certain thermometer varies with temperature according to the approximate law :

R=R_{\mathrm{o}}\left[1+\alpha\left(T-T_{\mathrm{o}}\right)\right]

The resistance is

101.6 \Omega

at the triple-point of water 273.16 K , and

165.5 \Omega

at the normal melting point of lead ( 600.5 K ). What is the temperature when the resistance is

123.4 \Omega