PLT Quiz

What is the working principle of Platinum Resistance Thermometer?

• the electrical resistance of a metal conductor changes as a function of length

• the electrical resistance of a metal conductor changes as a function of temperature

• the electrical resistance of a metal conductor changes as a function of mass

what is NOT an advantage of using Platinum Resistance Thermometer?

• Gives slow response

• Range from 200 to 1200 °C

• Gives precise reading of temperature

What is the property of PRT?

• unstable

• small drift

• not dependent on temperature

Label.

• copper wire

• platinum wire

• nickel wire

The resistance of platinum wire of PRT at the ice point is 5Ω and at steam point is 5.23Ω. When thermometer is inserted in a hot bath, the resistance of the platinum wire is 5.795Ω. Deduce the temperature of the bath.

• 375.75°C

• 365.65°C

• 345.65°C