Difference between revisions of "Resistor"
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===Resistors in Series=== | ===Resistors in Series=== | ||
: Adding [[resistor]]s in [[Series Circuit|series]] increases the [[Electrical Resistance|resistance]] in the [[circuit]]. | : Adding [[resistor]]s in [[Series Circuit|series]] increases the [[Electrical Resistance|resistance]] in the [[circuit]]. | ||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | |[[File:ResistorsSeries1.png|center|400px]] | ||
| + | | style="height:20px; width:175px; text-align:center;" |The [[Electrical Resistance|resistance]] between points A and B is: | ||
| + | |||
| + | 5Ω. | ||
| + | |- | ||
| + | |[[File:ResistorsSeries1.png|center|400px]] | ||
| + | | style="height:20px; width:175px; text-align:center;" |The [[Electrical Resistance|resistance]] between points A and B is: | ||
| + | |||
| + | 2Ω + 5Ω = 7Ω | ||
| + | |- | ||
| + | |[[File:ResistorsSeries1.png|center|400px]] | ||
| + | | style="height:20px; width:175px; text-align:center;" |The [[Electrical Resistance|resistance]] between points A and B is: | ||
| + | |||
| + | 2Ω + 5Ω + 9Ω = 16Ω | ||
| + | |} | ||
===Resistors in Parallel=== | ===Resistors in Parallel=== | ||
''NB: You only need to know what happens with identical [[resistors]] in [[Parallel Circuit|parallel]]. | ''NB: You only need to know what happens with identical [[resistors]] in [[Parallel Circuit|parallel]]. | ||
Revision as of 15:14, 27 February 2019
Contents
Key Stage 3
Meaning
A picture of a resistor.
A resistor is a component in an electrical circuit which makes it difficult to electricity to pass through it.
About Resistors
- A resistor is a component designed to have a particular resistance.
- Resistors are added to circuits to control the current which will pass through for a certain potential difference.
- The greater the resistance of a resistor the smaller the current will be.
- The resistance of a resistor can be found by attaching an ammeter in series with the resistor and a voltmeter in parallel with the resistor.
- All components in a circuit act as resistors, including wires. The longer a wire the more resistance it will have to a current.
|
 |
| A resistor. | The symbol for a resistor. |
Key Stage 4
Meaning
The symbol for a resistor.
A resistor is a component in an electrical circuit which makes it difficult to electricity to pass through it.
About Resistors
- A resistor is a component designed to have a particular resistance.
- Resistors are added to circuits to control the current which will pass through for a certain potential difference.
- The greater the resistance of a resistor the smaller the current will be.
- The resistance of a resistor can be found by attaching an ammeter in series with the resistor and a voltmeter in parallel with the resistor.
- All components in a circuit act as resistors, including wires. The longer a wire the more resistance it will have to a current.
Resistors in Series
- Adding resistors in series increases the resistance in the circuit.
 |
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 |
Resistors in Parallel
NB: You only need to know what happens with identical resistors in parallel.