1
Q
current
A
the charge transferred in one second
2
Q
voltage
A
the energy given to each coulomb of charge by the power supply
3
Q
power
A
the energy transferred in one second
4
Q
a.c electricity
A
alternating current is an electric current that reverses it direction many times a second at regular intervals, typically used in power supplies
5
Q
d.c electricity
A
Direct current is an electric current flowing in one direction only
Nat 5 Physics
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