Electrical systems

Electricity

The flow of tiny particles called charges or electrons, which are invisible but have observable effects.

Basic Requirements for Electric Current

Four essential components: input device, processor (control device), output device, and an energy source.

Complete Path

A continuous route that allows electric current to flow.

Load

Something that uses electric energy in a circuit.

Ohm's Law

A scientific law used to calculate voltage, current, and resistance in an electrical circuit.

Resistor

A component that opposes the flow of current in a circuit, measured in ohms (Ω).

Current (I)

The flow of electric charge, measured in amperes (A).

Voltage (V)

The potential difference in a circuit, measured in volts (V).

Resistance (R)

The opposition to current flow, measured in ohms (Ω).

Ohm's Law Triangle

A visual tool that helps remember the relationship between current, voltage, and resistance.

Effect of Voltage on Current