Electric circuits and electronics

Electrical quantities

Voltage or potential difference

The amount of energy that generator can transfer to electrons depends on its voltage (V) or electric tension. This is measured in volts (V).

Measuring electric current

Electric current (I) is the charge or number of electrons that flow through the cross-section of a conductor every second. We can express this mathematically as follows: I=Q/t. Electric current is measured in amperes or amps (A) in the International System.

Electrical resistance: Ohm's Law

Subtopic

An electric circuit

An electric circuit is a pathway for the flow of electrons. Electric current is a continous flow of electrons through a circuit.

Parts of an electric circuit

Generators provide the energy

Loads transform electrical energy in other types of energy

Switching devices direct and interrupt the flow of energy current

Diagrams and symboles