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P4 General Studies: Closed Circuits, Conductors and Insulators (Paper 4: mistake clinic)
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 4: mistake clinic)
Paper four drills the conductor, insulator, cell direction and series misconceptions until they stop.
Direct answers Remember one line: switch off, check the loop, then change parts.
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)
- FoundationName three conductors.
- FoundationWhat is the role of an insulator in a cable?
- FoundationWhat does a circuit need before current can flow?
- IntermediateTwo 1.5 V cells in series give what voltage?
- IntermediateWith three bulbs, how do series and parallel differ when one bulb fails?
- IntermediateWhy are wet hands more dangerous than dry hands around electricity?
- ChallengeThree 1.5 V cells in series with one reversed give what voltage?
- ChallengeFive bulbs are in series and two work loose. How many still light?
- ChallengeA bulb runs on 6 V at 0.25 A. What is its power?
- Error redoIs it true that rubber gloves are conductors, so they are useless for repairs?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | Copper, iron and salt water all conduct. | Metals and water with impurities are the usual conductors. |
| 2 | It wraps the conductor so current stays inside and nobody gets a shock. | An insulator is not a perfect barrier, it simply has a very high resistance. |
| 3 | It must be closed, forming a complete loop from one terminal back to the other. | Any gap anywhere stops the current. |
| 4 | 3.0 V. | 1.5 times 2 gives 3.0 V. |
| 5 | Series goes dark completely; parallel keeps the other two lit. | The difference is the number of paths: one against several. |
| 6 | Water lowers the resistance of the skin, so more current passes through the body. | Dry skin resists well; wet skin resists far less. |
| 7 | 1.5 V. | 1.5 plus 1.5 minus 1.5 gives 1.5 V. |
| 8 | None: two gaps leave the loop completely open. | One gap already stops a series circuit, so two change nothing. |
| 9 | 1.50 W. | 6 times 0.25 gives 1.50 W. |
| 10 | No, rubber is an insulator, but you must still switch off the supply first. | Insulation lowers the risk, it does not replace switching the power off. |
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.
With all four done, go back to the chapter page and revise the three parts of a closed circuit plus three safety habits.Tutor Registration →
Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.