Electric tension
Electric current
Electrical resistance
Electric power
Electrical voltage: It is the electrical potential difference (d.d.p.) existing between two distinct points of the circuit.
Electrical voltage (E or U)
Unit of measure: Volt (V).
Instrument of Measurement: Voltmeter.
Electric current: The ordered movement of negative electrical charges through a conductor.
Electrical current (I)
Unit of measure: Ampére (A).
Instrument of Measurement: Ammeter.
Electrical resistance: It is the opposition that a material offers to the passage of the electric current.
Electrical resistance (R)
Unit of measurement: Ohm ()
Instrument of Measurement: Ohmmeter. Meghômetro.
Electrical power: The amount of electrical work performed in the unit of time. (consumption).
Electrical power (P)
Unit of measurement: Watts (W); (GO).
Instrument of Measurement: Wattmeter.
