中文（繁體）
中文（简体）
English
P4 General Studies: Simple Circuits (Paper 3 (challenge))
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 3 (challenge))
Paper three adds current direction, voltage sharing and current sharing in real checking situations.
Direct answers Always give the unit; volts and amps are never interchangeable.
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)
- FoundationIn which direction does current flow in a circuit?
- FoundationA 4.5 V battery pack feeds 3 identical bulbs in series. What voltage does each get?
- FoundationTwo 1.5 V batteries are joined in parallel. What is the total voltage?
- IntermediateThree parallel bulbs each carry 0.2 A. What is the total current?
- IntermediateIf a bulb suddenly goes dark, is the bulb certainly broken?
- IntermediateFive of 500 products fail inspection. What proportion is that, in percentage points?
- ChallengeA series circuit has 7 joints and one comes loose. What happens to the bulbs?
- ChallengeThe same bulb runs on one battery, then on two in series. Which is brighter?
- ChallengeA 3 V battery feeds 2 identical parallel bulbs. What voltage does each see?
- Error redoError clinic: add more bulbs and the light must get brighter. True?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | From the positive terminal, through the outside circuit, to the negative terminal. | Electrons actually move the other way, but at primary level we use conventional current. |
| 2 | 1.5 V. | Series splits the voltage: 4.5 divided by 3 gives 1.5 V. |
| 3 | 1.5 V. | Parallel does not add voltage; it only gives more capacity and longer life. |
| 4 | 0.6 A. | Parallel currents add up: 0.2 times 3 gives 0.6 A. |
| 5 | Not necessarily. | The battery may be flat, a wire loose or the switch open, so check each in turn. |
| 6 | 1.0 percentage points. | Five divided by 500 times 100 gives 1.0 percentage points. |
| 7 | They all go out. | One loose joint breaks the path, so the current stops completely. |
| 8 | Two batteries in series give the brighter light. | Higher voltage drives a larger current through the bulb. |
| 9 | 3.0 V. | Parallel branches share the same voltage, equal to the supply voltage. |
| 10 | No. | In series each extra bulb takes a share of the voltage, so every bulb gets dimmer. |
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.
Paper four clears the conductor, insulator and battery direction misconceptions.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.