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==Key Stage 4==
===Meaning===
'''Direct current''' ('''DC''')is when [[electricity]] only flows in one direction.
===About Direct Current===
===Examples===
{| class="wikitable"
|-
|[[File:OscilloscopeScreenDC1.png|center|140px]]
|[[File:OscilloscopeScreenDC2.png|center|140px]]
|[[File:OscilloscopeScreenDC3.png|center|140px]]
|[[File:OscilloscopeScreenDC4.png|center|140px]]
|-
| style="height:20px; width:140px; text-align:center;" |This is a constant '''direct current''' from a 3V [[battery]].
| style="height:20px; width:140px; text-align:center;" |This is a fluctuating '''direct current'''.
| style="height:20px; width:140px; text-align:center;" |This is the '''direct current''' caused by [[Mains Electricity|mains electricity]] being passed through a [[diode]].
| style="height:20px; width:140px; text-align:center;" |This is the '''direct current''' caused by [[Mains Electricity|mains electricity]] being passed through a [[Rectifier]] which is a set of [[diodes]].
|}