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Electricity

Quantity Symbol Unit Definition in Series in Parallel
Charge Q Coloumbs (C) basic unit - -
Current I Amperes (A) charge
time
same split
Voltage
potential difference, emf
V Volts (V) energy
charge
split same
Resistance R Ohms (W) voltage
current
R = R1 + R 2
1
R
= 1
R1
+ 1
R 2
Power P Watts (W) energy
time
- -
Energy E Joules (J) power x time - -

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