plumiI = nqvA and charge carriers: Edexcel International A Level Physics questions
Edexcel International A Level Physics past-paper questions on 2.4.2.2 I = nqvA and charge carriers, 2019–2025, with mark schemes and examiner’s reports where available.
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All 21 questions on I = nqvA and charge carriers, as a list
- June 2025, AS Unit 2, Q10 (1 mark): Two wires, X and Y, are made of the same material. The wires are connected in series. The current in the wires is I, as shown. X Y I I Wire X has twice the diam
- January 2025, AS Unit 2, Q1 (1 mark): The formula for the current I in a conductor is I = nqvA. Which of the following gives the meaning of n? A number of conduction electrons in a wire of length 1
- October 2024, AS Unit 2, Q12 (3 marks): Copper wires are used to connect a length of nichrome wire to a cell, as shown. copper copper nichrome The copper wires and the nichrome wire have the same diam
- June 2024, AS Unit 2, Q14(b) (2 marks): Copper has a low resistivity compared with the resistivity of the conducting material. Explain how the low resistivity of copper affects the drift velocity of e
- 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, Q4 (1 mark): In a current-carrying copper wire, the drift velocity of the electrons is very small. Which of the following best explains this? A The charge on an electron is
- June 2023, AS Unit 2, Q16(c) (3 marks): The headlights are connected in the circuit using copper wire. The current in the wire is 4.60 A. Calculate the drift velocity of electrons in the copper wire.
- January 2023, AS Unit 2, Q13(a) (4 marks): Explain why the drift velocity of the charge carriers is the same value in wires W and Z. (4)
- 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
- October 2022, AS Unit 2, Q13(b)(iii) (2 marks): Calculate the drift velocity of the electrons in this copper wire. number of charge carriers per unit volume = 8.49 × 1028 m–3 current in copper wire = 0.14 A (
- October 2022, AS Unit 3, Q2(a) (3 marks): When salt dissolves in water, the salt breaks down into ions. The salt ions are charge carriers. The student predicted that the resistivity of the salt solution
- January 2022, AS Unit 2, Q11(b) (3 marks): A potential difference of 3.0 V is applied across the nichrome wire. Calculate the drift velocity of the conduction electrons in the nichrome wire. number of co
- 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)
- October 2021, AS Unit 2, Q3 (1 mark): The equation I = nqvA relates the current in a sample of a material to the movement of free charge carriers in the sample. Which of the following is a correct d
- June 2021, AS Unit 2, Q11(b) (4 marks): The current I in a conductor is given by the formula I = nqvA Complete the following table, which shows ratios of quantities for wires W and Z. The first row ha
- January 2021, AS Unit 2, Q11 (2 marks): A copper wire of radius 0.40 mm carries a current of 5.1 A. Calculate the drift velocity of the electrons in the wire. number of charge carriers per m3 for copp
- October 2020, AS Unit 2, Q9 (1 mark): Two copper wires are placed in series in a complete circuit. The electrons in the two wires have different values of drift velocity. Which of the following must
- January 2020, AS Unit 2, Q5 (1 mark): A copper wire has a cross‑sectional area of 5.0 × 10–7 m2. There is a current in the wire of 0.93 A. Copper has 8.4 × 1028 conduction electrons per metre cubed.
- June 2019, AS Unit 2, Q8 (1 mark): Two copper wires of identical cross-sectional area are placed in series in a circuit. Which of the following could be different for the two wires? A charge carr
- June 2019, AS Unit 2, Q12(a) (1 mark): State what is meant by drift velocity. (1)
- June 2019, AS Unit 2, Q12(b) (2 marks): A copper wire has a cross-sectional area of 2.64 × 10í m2 and carries a current of 1.31 A. Calculate the drift velocity of the electrons in this copper wire. n
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