Voltage (V) and current (W)
It has been some years since my physics lessons, but:
Unit of voltage is V (volt), symbol is U (or E or V.. varies).
Unit of current is A (ampere), symbol is I.
Unit of power is W (watt), symbol is P.
Unit of resistance is O (ohm), symbol is R.
And useful chart for cheating:
Calculation: electrical voltage, current, resistance, and power:-)
