0653.P4.2.04 — Calculate the combined resistance of two or 7 Recall and use in calculations, the fact that more resistors in series (a) . the sum of the cu: past paper questions
Real questions on 0653.p4.2.04 — calculate the combined resistance of two or 7 recall and use in calculations, the fact that more resistors in series (a) . the sum of the cu
The newest 20 of 29 written questions. Open one to see it on the real paper.
- 0653/41 · October/November 2025 · Q9d[3]
Two wires, A and B, are made of the same metal. Wire A has length 2.5 m, diameter 0.75 mm and resistance 0.16 Ω. Wire B has length 7.5 m and diameter 1.5 mm. resistance = Ω Calculate the resistance of wire B.
See it on the paper → - 0653/33 · May/June 2025 · Q9b(i)[2]
Calculate the resistance of the electric motor. resistance = Ω
See it on the paper → - 0653/33 · May/June 2025 · Q9b(ii)[3]
When fully charged, the battery stores 4600 J of energy. Calculate the time, in hours, that the battery can supply energy to the motor. time = h
See it on the paper → - 0653/32 · February/March 2025 · Q9c(iii)[2]
The voltage across the lamp is 6.5 V. The reading on the ammeter is 1.3 A. Calculate the resistance of the lamp. resistance = Ω
See it on the paper → - 0653/32 · February/March 2025 · Q9c(iv)[1]
The resistance of the variable resistor in Fig. 9.1 is increased. The voltage across the variable resistor increases. Explain why the voltage across the lamp decreases.
See it on the paper → - 0653/33 · October/November 2024 · Q3b[3]
Fig. 3.2 shows a circuit used to determine the resistance of resistor X. A X The reading on the voltmeter is 2.4 V. Calculate the resistance of resistor X. Give the unit of your answer. resistance = unit The reading on the ammeter is 0.16 A. Fig. 3.2 V
See it on the paper → - 0653/33 · October/November 2024 · Q3c(i)[1]
Resistor Y is connected in series with resistor X, as shown in Fig. 3.3. A X V Fig. 3.3 Describe how the reading on the ammeter in Fig. 3.3 compares with the reading on the ammeter in (b). Give a reason for your answer. reading reason Y
See it on the paper → - 0653/33 · October/November 2024 · Q3c(ii)[2]
Resistor Y is now connected in parallel with resistor X, as shown in Fig. 3.4. Y A X V Fig. 3.4 Describe how the reading on the ammeter in Fig. 3.4 compares with the reading on the ammeter in (b). Give a reason for your answer. reading reason
See it on the paper → - 0653/43 · October/November 2024 · Q9b(ii)[3]
Use your answer to (b)(i) to determine the resistance of one headlamp. resistance = Ω
See it on the paper → - 0653/33 · May/June 2024 · Q9a(i)[3]
The ammeter reads 0.55 A. Calculate the total resistance of the circuit. Give the unit of your answer. resistance = unit
See it on the paper → - 0653/33 · May/June 2024 · Q9a(ii)[1]
When the variable resistor is at minimum resistance, its resistance is zero. Use your answer to (a)(i) to calculate the value of the resistance of each lamp. resistance =
See it on the paper → - 0653/33 · May/June 2024 · Q9b(i)[1]
Predict what happens to the reading on the ammeter during this time.
See it on the paper → - 0653/33 · May/June 2024 · Q9b(ii)[1]
The lamps become less bright because the cells are ‘running down’ and need replacing. Suggest what measurement is made to check that the cells are ‘running down’.
See it on the paper → - 0653/33 · May/June 2024 · Q9c[3]
On Fig. 9.2, complete the circuit diagram for the circuit shown in Fig. 9.1. Fig. 9.2
See it on the paper → - 0653/32 · February/March 2024 · Q3c(i)[3]
Calculate the resistance of the kettle. Give the unit for your answer. resistance = unit
See it on the paper → - 0653/42 · February/March 2024 · Q6c(iii)[1]
The resistance of the variable resistor is increased. Explain why the reading on ammeter A1 decreases.
See it on the paper → - 0653/31 · October/November 2023 · Q6a(iii)[3]
The potential difference across resistor R is 3.6 V. Calculate the resistance of resistor R. Give the unit of your answer. resistance = unit
See it on the paper → - 0653/31 · October/November 2023 · Q6b(ii)[2]
The student connects resistor S in parallel with resistor R. Fig. 6.3 shows the circuit. R A S Fig. 6.3 Describe how the reading on the ammeter compares to the reading in (a). Give a reason for your answer. description reason
See it on the paper → - 0653/33 · October/November 2023 · Q6b(iii)[3]
Calculate the resistance of the electrical system of the house. Give the unit of your answer. resistance = unit
See it on the paper → - 0653/61 · May/June 2023 · Q4c(ii)[1]
The student closes the switch. The lamps light up. The combined potential difference V P across lamps L and M is 2.25 volts. The total current I P read by the ammeter in the circuit is 0.50 amps. The student opens the switch. Calculate the power, P P produced by lamps L and M in parallel. Use the equation shown. P = V...
See it on the paper →
What examiners said
The resistance is calculated by using the equation R = V ÷ I. Candidates found this question demanding, and most multiplied the voltage by the current to give 0.256 (Ω). The voltage multiplied by the current gives the power of the circuit and the unit for this is the watt, W.
— Examiner report, May/June 2025, 0653/33 Q9(b)(i) (Cambridge)
The equation for electrical energy had to be rearranged to answer this question. So, to calculate the time in E = I V t becomes t = E ÷ I V. The time is calculated in seconds, and this value is divided by 3600 to convert it into hours. Only a few candidates gained credit for this question.
— Examiner report, May/June 2025, 0653/33 Q9(b)(ii) (Cambridge)
The Ohm’s Law calculation was done successfully by most candidates. The most common error was multiplying the voltage by the current, instead of dividing the voltage by the current.
— Examiner report, February/March 2025, 0653/32 Q9(c)(iii) (Cambridge)
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