At fixed potential difference 3.0 V, a thermistor carries 0.0020 A in cool water and 0.0060 A in warm water. It is the type whose resistance falls as temperature rises.
.1
Calculate the resistance in cool water.
[2 marks]
.2
Calculate the resistance in warm water.
[2 marks]
.3
A pupil says the current tripled because the supply voltage tripled. Evaluate the statement using the data.
[2 marks]
5 marksHigher6.3.1.1 Density of materials
AQA Trilogy 8464
Spec and skills
Paper scope: P1
Spec 6.3.1.1
Original practice question
Answer and supported method checks
A rock has mass 0.54 kg and volume 200 cm³. A pupil writes its density as 0.0027 kg/m³.
.1
Calculate the correct density in kg/m³.
[3 marks]
.2
Explain why the pupil's numerical division is not sufficient to justify the stated unit.
[2 marks]
7 marksHigher6.1.1.2 Changes in energy
AQA Trilogy 8464
Spec and skills
Paper scope: P1
Spec 6.1.1.2
Original practice question
Answer and supported method checks
A spring stores 0.72 J when compressed by 0.060 m. It obeys Hooke's law throughout this compression. It launches an initially stationary 0.090 kg toy horizontally; 25% of the stored energy is dissipated.
.1
Calculate the spring constant.
[2 marks]
.2
Calculate the toy's speed when it leaves the spring.
[3 marks]
.3
Explain why the speed cannot be found by treating the dissipated energy as destroyed.
[2 marks]
4 marksFoundation and Higher6.4.1.1 The structure of an atom
AQA Trilogy 8464
Spec and skills
Paper scope: P1
Spec 6.4.1.1
Original practice question
Answer and supported method checks
An atom absorbs electromagnetic radiation and one electron moves to a higher energy level. Later the electron returns to its original level.
Explain the energy transfers and why the element does not change.
[4 marks]
6 marksFoundation and Higher6.3.3.1 Particle motion in gases
AQA Trilogy 8464
Spec and skills
Paper scope: P1
Spec 6.3.3.1
Original practice question
Answer and supported method checks
Three pressure measurements for the same sealed gas at 30 °C are 104 kPa, 105 kPa and 103 kPa. At 60 °C, three measurements are 114 kPa, 115 kPa and 113 kPa. The container volume is fixed.
.1
Calculate the mean pressure at 60 °C.
[2 marks]
.2
Calculate the difference between the mean pressures at the two temperatures.
[2 marks]
.3
Explain whether the repeats support a pressure increase.
