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CAIE A-Level Physics A2 M 4 Graphs Gradients Intercepts and Areas Questions

Practise sketching practical graph trends, calculating gradients and interpreting intercepts and areas to extract physical quantities.

Syllabus
2028–2030
Course
Physics 9702
Level
A2

Exam points

  • Interpret practical graphs by sketching trends and calculating gradients from plotted data.

CAIE A-Level Physics A2 M 4 Graphs Gradients Intercepts and Areas Questions question 1

[Maximum number: 1]

A student determines the specific latent heat of vaporisation of a liquid using the apparatus illustrated in Fig. 3.1.

Fig. 3.1

Fig. 3.1

The heater is switched on. When the liquid is boiling at a constant rate, the balance reading is noted at 2.0 minute intervals.

After 10 minutes, the current in the heater is reduced and the balance readings are taken for a further 12 minutes.

The readings of the ammeter and of the voltmeter are given in Fig. 3.2.

Fig. 3.2

Fig. 3.2

The variation with time of the balance reading is shown in Fig. 3.3.
balance reading/g

Fig. 3.3

Fig. 3.3

From time 0 to time 10.0 minutes, the mass of liquid evaporated is 56 g .

Use Fig. 3.3 to determine the mass of liquid evaporated from time 12.0 minutes to time 22.0 minutes.

mass =g [1]
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