中文（繁體）
中文（简体）
English
P4 General Studies: Simple Circuits (Paper 4 (error clinic))
Tutor Prep Guide · the digestive system and the food pyramid, enzymes and bile, energy and nutrient calculations, and balanced eating habits
P4 General Studies: Simple Circuits (Paper 4 (error clinic))
Paper four revisits the five commonest mistakes with four sums on voltage, current and percentage points.
Direct answers Words such as always or every are usually the signal of a false statement.
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: Simple Circuits |
| Level | parts of a closed circuit, conductors against insulators, series against parallel, adding up battery voltage, and electrical safety |
02 Questions (10 items)
- FoundationWhich two of copper, rubber, iron and glass are conductors?
- FoundationBesides a broken bulb, what else can keep a bulb dark?
- FoundationWhere must a switch go in a series circuit to control all the bulbs?
- IntermediateFour 1.5 V batteries are in series. What is the total voltage?
- IntermediateEight bulbs are in series and one fails. How many still light?
- IntermediateFive of 20 objects are insulators. What proportion is that, in percentage points?
- ChallengeFour parallel bulbs each carry 0.15 A. What is the total current?
- ChallengeWhat is it called when a wire joins the two battery terminals directly?
- ChallengeA 3 V supply feeds 3 identical bulbs in series. What voltage does each get?
- Error redoError clinic: adding batteries never changes the voltage. True?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | Copper and iron. | Metals conduct; rubber and glass insulate. |
| 2 | A flat battery, a loose wire or an open switch. | Start with the easiest check and rule out one cause at a time. |
| 3 | On the main path, in series with the battery. | Any point on the main path works, because a series circuit has only one path. |
| 4 | 6.0 V. | 1.5 times 4 gives 6.0 V. |
| 5 | None. | One break in a series circuit turns every bulb off. |
| 6 | 25.0 percentage points. | Five divided by 20 times 100 gives 25.0 percentage points. |
| 7 | 0.6 A. | 0.15 times 4 gives 0.6 A. |
| 8 | A short circuit. | The current becomes huge and the battery may overheat, leak or catch fire. |
| 9 | 1.0 V. | Series shares the voltage equally: 3 divided by 3 gives 1.0 V. |
| 10 | No. | In series the voltages add up; only in parallel does the voltage stay the same. |
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.