Physics Topic 2 Flashcards
(20 cards)
What is current
Current is the flow of charge (amps
What is potential difference
Potential difference is the energy per unit charge (volts)
What is resistance
Resistance reduces the current (Ohms)
What are the two types of circuits
The two types of circuits or series and parallel
What is the same everywhere in a series circuit
Current is the same everywhere in a series circuit
What is shared in a series circuit
Potential difference is shared in a series circuit
What is the same everywhere in a parallel circuit
Potential difference is the same everywhere in a parallel circuit
What is shared in a parallel circuit
Current is shared everywhere in a parallel circuit
What type of current is used in the UK mains
Alternating current is used in the UK mains
What is the voltage of the UK mains
The UK mains is 230v
What is the hertz of the UK mains
50hz is the hertz of the UK mains
What colour is the live wire in a plug
The live wire is brown
What colour is the neutral wire in a plug
The neutral wire is blue
What colours are the earth wire in a plug
The earth wire is green and yellow
What is the neutral wire used for
The neutral wire completes the circuit
What does the live wire carry
The live wire carries the UK mains current
What is the purpose of the earth wire
The earth wire is for safety
Where is electricity created in the UK
In the UK electricity is made in power stations
What does electricity go through after the power station
Electricity goes through a step up transformer where potential difference is increased to reduce energy loss
What does electricity go through before reaching our homes
Electricity goes through a step down transformer before reaching our homes
