What does the symbol on a power button mean? How did it come about?
Nearly everyone has seen the universal symbol for power — turning on and off — but not everyone knows why that symbol was ...
BBC7y
Electrical charge and current
Charge is a property of a body ... Key fact 'Amps' is an abbreviation for 'amperes', the unit for current (also abbreviated as 'A') but the symbol for 'current' is 'I'.
BBC12mon
Current, charge and time
The symbol for charge is \(Q\), it is measured in coulombs (\(C\)). The symbol for current is \(I\), it is measured in amperes (\(A\)). The symbol for time is \(t ...