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