Brown wire which alternates between a high positive and negative voltage of about 230V
1 of 17
Neutral wire
Blue wire which is always at 0V
2 of 17
Earth wire
Yellow and green wire which carries the current to the earth if there is a fault
3 of 17
Fuse
A fuse melts and cuts off the circuit if there is a surge in the current due to a fault. The fuse rating should be just higher than the normal operating current.
4 of 17
Circuit breaker
Similar to fuses, circuit breakers cut off a circuit if there is a surge in current. They work faster, are more convenient and are more effective than fuses.
5 of 17
Resistor
Resistors get hot when an electric current passes through them. The heating effect increases the resistance, so less current will flow.
6 of 17
Current
The rate of flow of charge around the circuit. Unit: Ampere
7 of 17
Voltage
The driving force that pushes the current around. Unit: Volt
8 of 17
Resistance
Anything in the circuit which slow the flow down. Unit: Ohm
9 of 17
Alternating current
When the current constantly changes direction.
10 of 17
Direct current
When the current keeps flowing in the same direction.
11 of 17
Series circuit
When different components are connected in a line. For example, fairy lights.
12 of 17
Parallel circuit
When each component is separately connected to the positive and negative of the supply. For example, household electrics.
13 of 17
Ammeter
Measures the current in a circuit. Always connected in series.
14 of 17
Voltmeter
Measures the voltage across a component. Always connected in parallel to the component being tested.
15 of 17
Conductor
Materials that conduct charge easily so a current can flow through them. Usually metals, e.g. copper and silver.
16 of 17
Insulator
Materials which don't conduct charge very well, so a current can't flow through them. Examples include plastic and rubber.
17 of 17
Other cards in this set
Card 2
Front
Blue wire which is always at 0V
Back
Neutral wire
Card 3
Front
Yellow and green wire which carries the current to the earth if there is a fault
Back
Card 4
Front
A fuse melts and cuts off the circuit if there is a surge in the current due to a fault. The fuse rating should be just higher than the normal operating current.
Back
Card 5
Front
Similar to fuses, circuit breakers cut off a circuit if there is a surge in current. They work faster, are more convenient and are more effective than fuses.
Comments
No comments have yet been made