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P4 General Studies: Closed Circuits, Conductors and Insulators (Paper 1: basics)
Tutor Prep Guide · parts of a closed circuit, conductors against insulators, series against parallel, adding up battery voltage, and electrical safety
P4 General Studies: Closed Circuits, Conductors and Insulators (Paper 1: basics)
Paper one goes from the closed circuit to battery voltage, with all figures checked in Python.
Direct answers Remember one line: check the loop first, then count the cell voltage.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 20 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: P4 General Studies: Closed Circuits, Conductors and Insulators |
| Level | parts of a closed circuit, conductors against insulators, series against parallel, adding up battery voltage, and electrical safety |
02 Questions (10 items)
- FoundationWhat is a closed circuit?
- FoundationWhich class of material is copper wire, and which is the plastic sheath around it?
- FoundationWhat does a switch do in a circuit?
- IntermediateTwo 1.5 V dry cells are joined in series. What is the total voltage?
- IntermediateThree 1.5 V dry cells in series give what voltage?
- IntermediateTen materials are tested and six turn out to be conductors. What percentage is that?
- ChallengeThree 1.5 V cells are in series but one is the wrong way round. What is the total voltage?
- ChallengeFour bulbs are in series and one works loose. How many still light?
- ChallengeSix 1.5 V cells in series give what total voltage?
- Error redoIs it true that a wooden chopstick conducts, so wood must be a conductor?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | A complete loop made of a battery, wires, a bulb and a switch. | Current needs a way out and a way back; one gap stops the flow. |
| 2 | Copper is a conductor and the plastic sheath is an insulator. | Copper carries current easily; plastic resists it and protects us. |
| 3 | It closes the circuit to let current flow and opens it to cut the current. | A switch only joins or breaks a piece of the wire; it does not make electricity. |
| 4 | 3.0 V. | 1.5 plus 1.5 gives 3.0 V. |
| 5 | 4.5 V. | 1.5 times 3 gives 4.5 V. |
| 6 | 60 percent. | 6 divided by 10, times 100, gives 60. |
| 7 | 1.5 V, because the reversed cell subtracts its voltage. | 1.5 plus 1.5 minus 1.5 gives 1.5 V. |
| 8 | None, because the single loop is broken. | A series circuit has only one path, so any gap stops all the current. |
| 9 | 9.0 V. | 1.5 times 6 gives 9.0 V. |
| 10 | No, wood is an insulator and does not conduct at everyday voltages. | Judge a material by the test result, not by a feeling in your hand. |
04 What to do after marking
- After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
- Repeat the same item two days later; move to the next paper only when both attempts are correct.
- Parents only need the answer and note columns; there is no need to explain every item.
After paper one, take paper two and sort out series against parallel in one pass.Tutor Registration →
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