# Series Circuit

## Key Stage 3

### Meaning

A Series Circuit is an electrical circuit with only one path for the current to flow.

### About Series Circuits

In a series circuit the current is the same at all locations.
Components placed in series share the potential difference supplied by the power supply.

### Examples

 The bulb and Ammeter are in series so they have the same Current going through them. The motor and resistor are in series so they have the same Current passing through them but share the 1.5V potential difference between them. The motor, resistor and bulb are in series so they all have the same Current passing through them but share the 1.5V potential difference between them.

## Key Stage 4

### Meaning

A Series Circuit is an electrical circuit with only one path for the current to flow.

### About Series Circuits

In a series circuit the current is the same at all locations.
Components placed in series share the potential difference supplied by the power supply.

### Examples

 The bulb and Ammeter are in series so they have the same Current going through them. The motor and resistor are in series so they have the same Current passing through them but share the potential difference between them. The motor, resistor and bulb are in series so they all have the same Current passing through them but share the potential difference between them.

### Resistors in Series

Adding resistors in series increases the resistance in the circuit.
The resistance of each resistor can be added together.
 The resistance between points A and B is: 5Ω. The resistance between points A and B is: 2Ω + 5Ω = 7Ω The resistance between points A and B is: 2Ω + 5Ω + 9Ω = 16Ω

### References

#### AQA

Series circuit, pages 54, 62-3, GCSE Physics; Student Book, Collins, AQA
Series circuits, pages 185, 187, GCSE Combined Science; The Revision Guide, CGP, AQA
Series circuits, pages 28, 30, GCSE Physics; The Revision Guide, CGP, AQA
Series circuits, pages 295, 301-2, GCSE Combined Science Trilogy 1, Hodder, AQA
Series circuits, pages 37, 46, GCSE Physics, Hodder, AQA
Series circuits, pages 58-59, GCSE Physics; Third Edition, Oxford University Press, AQA
Series circuits, pages 68-71, 77, 78, GCSE Combined Science Trilogy; Physics, CGP, AQA
Series circuits, pages 70-73, 79, 80, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
Series circuits; controlling the current, page 40, GCSE Physics, Hodder, AQA

#### Edexcel

Series circuits, page 141, GCSE Physics, Pearson Edexcel
Series circuits, page 75, GCSE Physics; The Revision Guide, CGP, Edexcel
Series circuits, pages 188, 189, GCSE Combined Science; The Revision Guide, CGP, Edexcel
Series circuits, pages 231-234, GCSE Physics, CGP, Edexcel
Series circuits; resistors, pages 146-147, GCSE Physics, Pearson Edexcel

#### OCR

Series circuits, page 102-103, 110, 260-263, Gateway GCSE Physics, Oxford, OCR
Series circuits, pages 180, 181, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR
Series circuits, pages 48, 49, Gateway GCSE Physics; The Revision Guide, CGP, OCR