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47083
Direct and alternating current
Description
Mind Map on Direct and alternating current, created by ryansimon on 15/04/2013.
Mind Map by
ryansimon
, updated more than 1 year ago
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Created by
ryansimon
about 11 years ago
123
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Resource summary
Direct and alternating current
Direct Current
flows in only one direction
Will be a flat line on an oscilloscope
constant potential and is normally produced by cells and batteries
electrons always flow round the circuit in the same direction
a mobile phone uses this supply
Alternating current
changes direction
will be a wavy line on an oscilloscope
has a potential difference that switches smoothly between positive and negative values as part of a repeating cycle
this causes the current to constantly change in size or reverse its direction very rapidly
we have ac mains in the UK
230 volts
50 hertz frequency
a washing machine uses this supply
they are both a flow of charge
the potential difference can be measured on an oscilloscope for both currents
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