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Flashcards in Current Electricity Deck (13):
1

Closed circuit

Is needed for the current to flow , if there is a break in a circuit then the current won't flow ~> the electrical energy can't get though .

2

Current electricity

An electric current is caused by the flow of electrons through a good conductor such as metal

3

Current

Symbol = I
Unit = ampere
Unit symbol = A
Measured using = Ammeter

4

Potential difference / voltage

Symbol =V
Unit = Voltage
Unit symbol = V
Measured using = Voltmeter

5

Resistance

Symbol = R
Unit = Ohm
Measured using = Ω
Measured using = Ohmmeter

6

Bulbs in series

If a bulb in series blows , none of them turn on .
The same amount of current flows through each bulb in the series .
The voltage is split up , depending on the size of the bulb .

7

Bulbs in parallel

The lights in your house are connected in parcelled , as are car head lights .
If the light in your bedroom blows , the kitchen light is unaffected .
The current is split between bulbs , if they are the same size the current is split evenly .
They are brighter because the same voltage flows through each bulb .

8

Mains supply

The mains supply (the electricity in our homes , supplied by ESB) is A.C
It flows at a potential difference of 230 volts .

9

Fuses

A fuse is a safety device that prevents the circuit from overheating , it will melt when it is too hot , breaking the circuit

10

Circuit breaker

A circuit breaker is used in the fuse board of the home , and this trips , to stop the flow of current from entering the house .

11

Live wire

The live wire is brown and carries most electricity it is connected to the plugs fuse on the right hand side

12

Neutral wire

The neutral wire is blue and is connected to the left hand side

13

Watt

Is the unit of electrical power