CAIE A-Level Physics A2 14.2.1 A Physical Property That Varies with Temperature May Be Used for the Topic Practice

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Question 1

[Maximum number: 4]

Question (a)

(a)

Fig. 2.1 shows a simplified diagram of a type of thermometer called a platinum resistance thermometer.

Fig. 2.1

Fig. 2.1

The glass tube is immersed in the environment for which the temperature is to be determined. The resistance between the terminals X and Y is measured.

Fig. 2.2 shows the variation of the resistivity ρ\rho of platinum with thermodynamic temperature T.

Fig. 2.2

Fig. 2.2

[ 4 ]

Question (i)

(i)

Explain how Fig. 2.2 shows that platinum is a suitable metal for use in a resistance thermometer.

[ 2 ]

Question (ii)

(ii)

Suggest a reason why a platinum resistance thermometer is not suitable for measuring a rapidly changing temperature.

[ 1 ]

Question (iii)

(iii)

Suggest a type of thermometer that is suitable for measuring a rapidly changing temperature.

[ 1 ]
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