plumiElectrical quantities: CAIE IGCSE Physics questions
Every CAIE IGCSE Physics exam question on 4.2 Electrical quantities, June 2024 and the specimen papers, with its mark scheme and examiner’s report.
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Calculations
Q8(c)
The whole paper ↗![June 2024 Paper 3, question 8(c): The resistance of the solenoid is 8.0 Ω. The current in the solenoid is 1.2 A. Calculate the potential difference (p.d.) across the solenoid. p.d. = V [3] [Tota](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062531-jun24-08-c-qp.webp)
Q9(b)(ii)
The whole paper ↗![June 2024 Paper 3, question 9(b)(ii): The current in the input coil of the transformer is 1.4 A. Calculate the input power to the desktop computer. input power = W [3] [Total: 9]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062531-jun24-09-bii-qp.webp)
Q6(a)(i)
The whole paper ↗![June 2024 Paper 4, question 6(a)(i): State what is meant by ‘electric field’. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062541-jun24-06-ai-qp.webp)
Q6(a)(ii)
The whole paper ↗![June 2024 Paper 4, question 6(a)(ii): Draw on Fig. 6.1 to show the pattern and direction of the electric field produced by the charge on the sphere. Draw at least four lines. [3]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062541-jun24-06-aii-qp.webp)
Q6(b)(i)
The whole paper ↗![June 2024 Paper 4, question 6(b)(i): State what happens in the wire as the sphere is discharged. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062541-jun24-06-bi-qp.webp)
Q6(b)(ii)
The whole paper ↗
Q7(a)
The whole paper ↗![June 2024 Paper 4, question 7(a): Define the term electromotive force. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062541-jun24-07-a-qp.webp)
Q7(b)(ii)
The whole paper ↗
Q2(a)(i)
The whole paper ↗![June 2024 Paper 6, question 2(a)(i): Record the readings on the ammeter and voltmeter. Include the units. 0.4 0.6 4 5 6 3 7 0.2 0.8 2 8 1 9 0 1.0 0 10 A V Fig. 2.2 I = V50 = [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062561-jun24-02-ai-qp.webp)
Q2(a)(ii)
The whole paper ↗![June 2024 Paper 6, question 2(a)(ii): Calculate the resistance R50 of 50.0 cm of the resistance wire using the equation R50 = V50 I . Include the unit. R50 = [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062561-jun24-02-aii-qp.webp)
Q2(a)(iii)
The whole paper ↗![June 2024 Paper 6, question 2(a)(iii): Calculate r1, a value for the resistance per cm of the resistance wire, using the equation r1 = R50 d , where d = 50.0 cm. Include the unit. r1 = [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062561-jun24-02-aiii-qp.webp)
Q2(b)(i)
The whole paper ↗![June 2024 Paper 6, question 2(b)(i): State whether your results support this suggestion and justify your statement by reference to the results. statement justification [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062561-jun24-02-bi-qp.webp)
Q2(b)(ii)
The whole paper ↗![June 2024 Paper 6, question 2(b)(ii): The student plans to plot a graph of resistance R against length d to test the suggestion. Suggest suitable additional values of length d to use. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062561-jun24-02-bii-qp.webp)
All 32 questions on Electrical quantities, as a list
- June 2024, Paper 1, Q25 (1 mark): Which material is a good electrical conductor? A glass B copper C rubber D wood
- June 2024, Paper 1, Q26 (1 mark): What is an electric current and how is an ammeter positioned in a circuit to measure the current in a resistor? what is an positioning electric current? of an a
- June 2024, Paper 1, Q27 (1 mark): Which unit is used for the potential difference (p.d.) between two points in an electrical circuit? A ampere (A) B joule (J) C ohm () D volt (V)
- June 2024, Paper 2, Q26 (1 mark): A student determines the resistance of resistor R. She uses a circuit including a voltmeter and an ammeter. Which circuit does she use? A B C D V A V V A R R R
- June 2024, Paper 3, Q8(c) (3 marks): The resistance of the solenoid is 8.0 Ω. The current in the solenoid is 1.2 A. Calculate the potential difference (p.d.) across the solenoid. p.d. = V [3] [Tota
- June 2024, Paper 3, Q9(b)(ii) (3 marks): The current in the input coil of the transformer is 1.4 A. Calculate the input power to the desktop computer. input power = W [3] [Total: 9]
- June 2024, Paper 4, Q6(a)(i) (1 mark): State what is meant by ‘electric field’. [1]
- June 2024, Paper 4, Q6(a)(ii) (3 marks): Draw on Fig. 6.1 to show the pattern and direction of the electric field produced by the charge on the sphere. Draw at least four lines. [3]
- June 2024, Paper 4, Q6(b)(i) (2 marks): State what happens in the wire as the sphere is discharged. [2]
- June 2024, Paper 4, Q6(b)(ii) (3 marks): It takes a time of 0.14 ns for the sphere to discharge completely. Calculate the average current in the earthed wire as the sphere discharges. average current =
- June 2024, Paper 4, Q7(a) (2 marks): Define the term electromotive force. [2]
- June 2024, Paper 4, Q7(b)(ii) (4 marks): The resistance of the variable resistor can be varied from 0 Ω to a maximum resistance of 150 Ω. Using the axes in Fig. 7.1, draw a graph to show how the curren
- June 2024, Paper 6, Q2(a)(i) (2 marks): Record the readings on the ammeter and voltmeter. Include the units. 0.4 0.6 4 5 6 3 7 0.2 0.8 2 8 1 9 0 1.0 0 10 A V Fig. 2.2 I = V50 = [2]
- June 2024, Paper 6, Q2(a)(ii) (2 marks): Calculate the resistance R50 of 50.0 cm of the resistance wire using the equation R50 = V50 I . Include the unit. R50 = [2]
- June 2024, Paper 6, Q2(a)(iii) (2 marks): Calculate r1, a value for the resistance per cm of the resistance wire, using the equation r1 = R50 d , where d = 50.0 cm. Include the unit. r1 = [2]
- June 2024, Paper 6, Q2(b)(i) (2 marks): State whether your results support this suggestion and justify your statement by reference to the results. statement justification [2]
- June 2024, Paper 6, Q2(b)(ii) (2 marks): The student plans to plot a graph of resistance R against length d to test the suggestion. Suggest suitable additional values of length d to use. [2]
- Specimen, Paper 1, Q28 (1 mark): A plastic rod is rubbed with a cloth. The rod becomes positively charged. What happens to the plastic rod and what is the charge on the cloth? plastic rod charg
- Specimen, Paper 2, Q28 (1 mark): A plastic rod is rubbed with a cloth. The rod becomes positively charged. What happens to the plastic rod and what is the charge on the cloth? plastic rod charg
- Specimen, Paper 2, Q29 (1 mark): The electromotive force (e.m.f.) of a mobile phone battery is 3.7 V. What does this mean? A 3.7 J is the maximum energy the battery can provide in 1.0 s. B 3.7
- Specimen, Paper 2, Q31 (1 mark): A water heater is connected to a 230 V supply and there is a current of 26 A in the heater. It takes 20 minutes to heat the water to the required temperature. H
- Specimen, Paper 3, Q10(c) (3 marks): The potential difference across the motor is 250 V. The current in the motor is 2.0 A. Calculate the resistance of the motor. resistance = Ω [3]
- Specimen, Paper 4, Q9(a) (2 marks): Referring to the charge on the ball, explain why the ball moves to the positive plate after touching the negative plate. [2]
- Specimen, Paper 4, Q9(b) (2 marks): State which particles move when there is a current and state the direction in which they move through the sensitive ammeter. particles: direction: [2]
- Specimen, Paper 4, Q9(c) (3 marks): For each complete oscillation of the ball moving between the plates, a charge of 8.5 × 10–10 C is transferred from one plate to the other. The frequency of osci
- Specimen, Paper 6, Q2(a)(i) (1 mark): On Fig. 2.1, draw a voltmeter connected to measure the potential difference (p.d.) V across terminals P and Q. [1]
- Specimen, Paper 6, Q2(a)(ii) (2 marks): The student connects the crocodile clip to a length l = 90.0 cm of the resistance wire and measures the potential difference V across terminals P and Q and the
- Specimen, Paper 6, Q2(b) (1 mark): The student then connects the crocodile clip to lengths l = 60.0 cm and l = 40.0 cm of the resistance wire. She measures the potential difference V across termi
- Specimen, Paper 6, Q2(c)(i) (2 marks): Calculate, and record in Table 2.1, the resistance R of each length l of the wire. V . Use the readings from the table and the equation R = I [2]
- Specimen, Paper 6, Q2(c)(ii) (1 mark): Calculate, and record in Table 2.1, the value of l [1]
- Specimen, Paper 6, Q2(d) (1 mark): Another student suggests that the values of l State whether the results support this suggestion. Justify your statement with reference to values from the result
- Specimen, Paper 6, Q2(e) (1 mark): Suggest one difficulty which explains why different students, doing the experiment carefully with the same equipment, may not obtain identical results. [1]
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