What is an electrical circuit
A system of conductors and components forms a complete path current for flow.
Properties of an electrical circuit including
- Voltage (Volts/V)
- Current (Amps/A)
- Resistance (Ohms/Ω)
The conventional current that assumes current flows out of the positive side of the battery, through the circuit & back to the negative side of the battery. This was the convention established when electricity was first discovered, but it is incorrect.
Voltage (V) – the force (pressure) that causes current flow.
Resistance (Ω ) – material’s tendency to resist the current.
Current in a resistor varies directly proportional to the voltage applied to it and inversely proportional to the resistor’s value.
Current is a rate of flow of charges.
Why does the current flow?
A voltage source provides the energy (or work) required to produce a current.
A source takes charge particles (usually electrons) and raises their potential. So they flow out in one terminal into and through a transducer (light bulb or motor) on their way back to the source of the other terminal.