2.1 use the following units: ampere (A), coulomb (C), joule (J), ohm (Ω), second (s), volt (V), watt (W).
Unit of current: ampere (A)
Unit of charge: coulomb (C)
Unit of energy: Joule (J)
Unit of resistance: ohm (Ω)
Unit of time: second (s)
Unit of voltage or potential difference: volt (V)
Unit of Power: watt (W)