Resistance, R · CSEC Physics

49 past-paper questions on Resistance, R, part of Electricity and Magnetism, from every CSEC Physics paper on Quelpr.

1. 4(c)(i)5 marks· CSEC Physics · 1988 · Paper 2State what is wrong with the circuit, what the ammeter reading would be, and what the voltmeter reading would be.
2. 4(c)(iii)3 marks· CSEC Physics · 1988 · Paper 2If the current through Rx when the circuit is correctly wired is 0.16 A, what is the voltmeter reading?
3. 4(a)(ii)1 mark· CSEC Physics · 1992 · Paper 2The terminals X and Y are connected to a 2 Ω resistor. The peak value of the potential difference is 4 V. Calculate the peak value of the output current.
4. 3(a)(ii)7 marks· CSEC Physics · 1993 · Paper 2A boy touches one terminal of a 12 V car battery with his right hand and the other terminal with his left hand simultaneously. Calculate the current flowing with dry hands and with wet hands, and state what effect, if…
5. 4(c)(ii)3 marks· CSEC Physics · 1995 · Paper 2The potential difference from the secondary coil of such a transformer is 18 V, and the charging current through the 12 V battery is 2 A. What is the value of the variable resistance?
6. 4(a)(ii)1 mark· CSEC Physics · 1996 · Paper 2Explain why it is necessary for the voltmeter to have a high resistance.
7. 4(a)(iii)5 marks· CSEC Physics · 1996 · Paper 2Complete Table 2 to show how the meter readings change when the sliding contact on the rheostat is moved from end X to the other end Y.
8. 4(b)(i)3 marks· CSEC Physics · 1996 · Paper 2Find the resistance of the resistance wire.
9. 4(b)(ii)2 marks· CSEC Physics · 1996 · Paper 2Find the resistance of the lamp when the current flowing is 0.20 A.
10. 4(b)(iii)2 marks· CSEC Physics · 1996 · Paper 2The lamp, resistance wire and a battery are now connected in series. If the current in the circuit is 0.20 A, determine the total potential difference across the lamp and resistance wire.
11. 5(b)(ii)3 marks· CSEC Physics · 2021 · Paper 2The peak voltage is applied by the generator across a 100.0 Ω resistor. Calculate the peak value of the current in the resistor.
12. 1(e)3 marks· Physics Q1 1(e)Calculate the current I₂ in the secondary windings when V₁ = 50 V.
13. 1(g)3 marks· Physics Q1 1(g)Three devices with resistances 8 Ω, 12 Ω and 15 Ω are connected in a circuit. Find the combined resistance of these devices when they are arranged in parallel.
14. 2(a)2 marks· Physics Q2 2(a)Explain what is meant by 'electrical resistance'.
15. 2(c)(ii)3 marks· Physics Q2 2(c)(ii)Calculate the resistance of this lamp while it is lit.
16. 3(a)(i)1 mark· Physics Q3 3(a)(i)Explain what is meant by the term 'electrical resistance'.
17. 3(a)(ii)6 marks· Physics Q3 3(a)(ii)Complete Table 2 to provide information regarding electrical meters.
18. 3(b)(i)1 mark· Physics Q3 3(b)(i)State the formula which relates voltage, V, current, I and resistance, R.
19. 3(b)(i)6 marks· Physics Q3 3(b)(i)Reading on A₁
20. 3(b)(ii)3 marks· Physics Q3 3(b)(ii)Calculate the value of R₂.
21. 3(b)(ii)2 marks· Physics Q3 3(b)(ii)Reading on A₂
22. 3(b)(iii)2 marks· Physics Q3 3(b)(iii)What is the reading on voltmeter (V)?
23. 3(b)(iv)3 marks· Physics Q3 3(b)(iv)If switch S is closed, what would be the new reading on ammeter, (A)?
24. 4(b)(i)3 marks· Physics Q4 4(b)(i)Calculate the peak value of the output current.
25. 4(b)(ii)3 marks· Physics Q4 4(b)(ii)If the resistor is 45Ω, determine the peak-to-peak voltage across the resistor.
26. 5(a)(i)1 mark· Physics Q5 5(a)(i)State the formula that relates the potential difference across a metallic conductor at constant temperature to the current through it.
27. 5(a)(ii)1 mark· Physics Q5 5(a)(ii)State the formula that expresses the total resistance, R_T, of two resistors, R₁ and R₂, in parallel.
28. 5(b)(i)3 marks· Physics Q5 5(b)(i)Calculate the total resistance in the circuit.
29. 5(b)(i)5 marks· Physics Q5 5(b)(i)Assuming negligible losses in the connecting wires, calculate the required potential difference of the supply.
30. 5(b)(i)6 marks· Physics Q5 5(b)(i)Determine the total resistance.
31. 5(b)(i)2 marks· Physics Q5 5(b)(i)What is the resistance of the bulb?
32. 5(b)(i)1 mark· Physics Q5 5(b)(i)State ONE characteristic of resistors connected in series.
33. 5(b)(i)2 marks· Physics Q5 5(b)(i)Calculate the equivalent resistance that one can use in series.
34. 5(b)(ii)6 marks· Physics Q5 5(b)(ii)Determine the current drawn from the supply if all three bulbs are lit.
35. 5(b)(ii)3 marks· Physics Q5 5(b)(ii)Calculate the current drawn from the 12V battery.
36. 5(b)(ii)3 marks· Physics Q5 5(b)(ii)Calculate the current in the 5 kΩ resistor.
37. 5(b)(ii)1 mark· Physics Q5 5(b)(ii)State ONE characteristic of resistors connected in parallel.
38. 5(b)(ii)4 marks· Physics Q5 5(b)(ii)Assuming the resistance of the bulb remains constant once lit, calculate the ammeter reading if the rheostat is set to 100 Ω.
39. 5(b)(ii)4 marks· Physics Q5 5(b)(ii)Calculate the equivalent resistance that one can use in parallel.
40. 5(b)(iii)5 marks· Physics Q5 5(b)(iii)At a reasonable cranking rate, the unit generates 6.2 V. Calculate the current in the circuit if the resistance is 310 Ω.
41. 5(b)(iii)1 mark· Physics Q5 5(b)(iii)If the 2 kΩ resistor burns out, what current now flows in the 5 kΩ resistor?
42. 5(b)(iii)3 marks· Physics Q5 5(b)(iii)Calculate the voltage across R₂.
43. 5(c)(i)2 marks· Physics Q5 5(c)(i)Calculate the equivalent resistance of the resistors shown in Figure 7.
44. 5(c)(ii)4 marks· Physics Q5 5(c)(ii)Calculate the equivalent resistance of the resistors in Figure 8.
45. 5(c)(ii)5 marks· Physics Q5 5(c)(ii)Complete Table 2 showing any necessary working.
46. 5(c)(iii)3 marks· Physics Q5 5(c)(iii)Calculate the total current flowing through the circuit.
47. 5(c)(iv)3 marks· Physics Q5 5(c)(iv)Assuming that these devices are connected in parallel across the mains supply, and are switched ON, calculate the TOTAL current drawn from the mains.
48. 6(b)(i)2 marks· Physics Q6 6(b)(i)calculate the equivalent resistance across BC.
49. 6(b)(ii)4 marks· Physics Q6 6(b)(ii)Calculate the current flowing in the closed circuit.