plumiResistivity (core practical 7): Edexcel International A Level Physics questions
Edexcel International A Level Physics past-paper questions on 2.4.2.1 Resistivity (core practical 7), 2019–2025, with mark schemes and examiner’s reports where available.
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All 37 questions on Resistivity (core practical 7), as a list
- June 2025, AS Unit 2, Q11 (3 marks): A wire has a resistance of 65 mΩ. The length of the wire is 0.25 m. The wire has a circular cross-sectional area. Calculate the diameter of the wire. –8 Ω m res
- January 2025, AS Unit 2, Q8 (1 mark): A student used an ohmmeter to investigate the resistance of a uniform copper wire of length L, as shown. L d copper wire Ω Length d of the wire has resistance R
- January 2025, AS Unit 2, Q13(b) (3 marks): When the wire is at the correct temperature for cutting, the resistance of the wire is 0.67 Ω. The wire has a circular cross-section. Calculate the resistivity
- October 2024, AS Unit 2, Q15(a) (4 marks): Each metal strip has a rectangular cross-section of width 1.40 mm and thickness 0.23 mm. The resistance between the terminals is 0.16 Ω. The connectors and term
- October 2024, AS Unit 2, Q15(b) (3 marks): The strain gauge is stretched and the length l of the metal strips increases. The metal strips change shape uniformly along their length. Explain why a graph of
- June 2024, AS Unit 2, Q14(a)(i) (1 mark): State what is meant by resistivity of a material. (1)
- June 2024, AS Unit 2, Q14(a)(ii) (4 marks): Describe how the student could determine a value for the resistivity of the conducting material. You do not need to draw a circuit diagram. (4)
- June 2024, AS Unit 2, Q14(d) (5 marks): A student designs a heating system using five heating panels, as shown. conducting material 24 V 1.60 m 51 cm To be safe, the maximum power of the student’s hea
- June 2024, AS Unit 3, Q4(c)(i) (2 marks): Explain how a graph of R L against L can be used to determine the value of ρ. (2)
- June 2024, AS Unit 3, Q4(c)(v) (3 marks): Determine the value of ρ from the graph. d = 0.27 mm (3) ρ =
- January 2024, AS Unit 2, Q16(a) (3 marks): The steel cable has a diameter of 12 mm. The total resistance of the cable is 0.078 Ω. Calculate the total length of the cable. resistivity of steel = 1.4 × 10
- January 2024, AS Unit 2, Q16(c) (3 marks): The steel cable is replaced with a copper cable. The copper cable has the same length and diameter as the steel cable. During a thunderstorm, the p.d. between t
- October 2023, AS Unit 2, Q13(a) (3 marks): Calculate the thickness of the layer of carbon. –5 Ω m resistivity of carbon = 3.7 × 10 (3) Thickness of layer of carbon =
- October 2023, AS Unit 3, Q2(c) (4 marks): The total length l of copper in the circuit is given by l = 2x + 0.050 m The copper rods have a diameter of 3.0 mm. Determine the resistivity of the copper. (4)
- October 2023, AS Unit 3, Q2(d) (2 marks): The safety system of the railway estimates the position of a train on the track using a resistance measurement. The rails become worn with continual use, so the
- January 2023, AS Unit 2, Q13(b) (4 marks): Wires W and Z are now connected in series as shown. W Z Complete the table by placing a cross in the correct box for each quantity. (4) Same value for Quantity
- January 2023, AS Unit 3, Q1(b)(i) (4 marks): Describe how the student could determine an accurate value for the thickness of the graphite pencil shading. The method should use a suitable graph. (4)
- October 2022, AS Unit 2, Q13(b)(i) (2 marks): Show that the cross-sectional area of this wire was about 2 × 10–8 m2 . (2)
- October 2022, AS Unit 2, Q13(b)(ii) (2 marks): Calculate the length of copper wire used by the student. resistivity of copper = 1.68 × 10–8 Ω m (2) Length of copper wire =
- October 2022, AS Unit 3, Q2(b)(i) (3 marks): The student wrote the following conclusion. The resistivity of the salt solution is inversely proportional to the mass of salt dissolved in the sample. Explain
- October 2022, Unit 6, Q4(b)(i) (3 marks): Show that the resistivity ρ of the metal is about 5 × 10–7 Ω m. (3)
- October 2022, Unit 6, Q4(d) (3 marks): The student wanted to confirm that the metal of the wire is constantan. The student compared his calculated values of ρ and RL to published values for constanta
- June 2022, AS Unit 2, Q13(b)(i) (3 marks): Calculate the drift velocity v of the electrons in the tungsten wire. number of charge carriers per m3 in tungsten = 1.26 × 1029 (3) v =
- June 2022, AS Unit 2, Q13(b)(ii) (3 marks): When the potential difference across the tungsten filament is 140 V the current in the filament is 0.44 A. The table shows typical resistivity values for tungst
- June 2022, Unit 4, Q18(c)(ii) (3 marks): Suggest why the percentage reduction in kinetic energy increases as the thickness of the plate increases. (3)
- January 2022, AS Unit 2, Q11(a) (2 marks): Calculate the resistivity of nichrome. (2) Resistivity =
- January 2022, AS Unit 2, Q11(c) (3 marks): A student suggests that the drift velocity will double if the length of wire used in the circuit is halved. Comment on this suggestion. (3)
- January 2022, AS Unit 3, Q4(a)(ii) (3 marks): Determine t using data from the graph. ρ = 4.0 × 103 Ω m L = 10.0 cm (3)
- October 2021, AS Unit 2, Q13(a) (4 marks): Calculate the length of the wire in the filament. (4) Length of wire =
- June 2021, AS Unit 2, Q18(a) (3 marks): Show that the resistance of one resistor at room temperature is about 24 Ω. (3)
- January 2021, AS Unit 2, Q19(a) (2 marks): Complete the circuit diagram for this experiment. (2) nichrome wire
- January 2021, AS Unit 2, Q19(b)(i) (4 marks): Determine the resistivity of nichrome. cross sectional area of nichrome wire = 5.31´10−8 m2 (4) Resistivity of nichrome =
- January 2021, Unit 4, Q16(b)(i) (2 marks): Show that the resistance of the plasma is about 1.9 × 10−7 Ω. resistivity = 3.30 × 10−8 Ω m (2)
- October 2020, AS Unit 2, Q7 (1 mark): A small metal cube, with sides of length x, is connected in a circuit. The current through the cube, between opposite faces, is I and the potential difference a
- January 2020, AS Unit 2, Q18(b)(iii) (3 marks): Show that the resistivity of the air in the lightning channel is about 0.2 Ω m. (3)
- January 2020, AS Unit 2, Q18(b)(iv) (1 mark): The accepted value for the resistivity of air is 1016 Ω m. Suggest why the value calculated from the data is so much less than the accepted value. (1)
- June 2019, AS Unit 2, Q11 (3 marks): A student carried out an experiment to determine the resistivity of a metal in the form of a wire. She made the following measurements: length of wire = 0.20 m
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