CAPE Physics Unit 1 · 2014 · Paper 1 · Question Q31

The readings of a resistance thermometer are 20.0\text{ ohms} at ice point, 28.2\text{ ohms} at steam point and 23.1\text{ ohms} at an unknown temperature. The unknown temperature on the centigrade scale of the thermometer is

1. (A)0.03\text{ }^\circ\text{C}
2. (B)0.38\text{ }^\circ\text{C}
3. (C)3.7\text{ }^\circ\text{C}
4. (D)37.8\text{ }^\circ\text{C}