(Electricity 03) Current Electricity Flashcards
To operate an electrical device, you need a steady flow of electrons.
In order to have a steady flow of electrons, you need:
- An energy source
- A complete path called a CIRCUIT.
When you have an energy source and a circuit, you have:
Current electrcity.
What are the parts of an electrical circuit?
- Energy Source
- Electrical Load
- Conducting Wires
- Switch
What is an energy source?
It provides the source of electrons for the circuit.
Ex. Battery
What is an electrical load?
It converts electrical energy to another form of energy. Ex. light.
Ex. Lightbulb
What are conducting wires?
They allow for the flow of electrons.
Ex. Copper wire
What is a switch?
It turns the circuit on (closed) or off (open).
Ex. Light switch
What is potential energy?
Potential energy is the energy stored in an object.
Ex. Battery
What is an electric current?
The rate of flow of electrons in a conductor.
What is current measured with?
An ammeter.
What are conductors?
Conductors such as metals allow electrons to flow freely though them and have low resistance values.
What are resistors?
An electrical component that limits or regulates the flow of electrical current in an electronic circuit.
When a substance resist the flow of electrons is slows down the current and converts the electrical energy into other forms of energy.
The more the resistance it has, the more ____ it gets from the electrons that pass through it.
Energy.
Ex. a current passes through a light bulb. The resistor is the filament in the bulb. The filaments resistance to electron flow causes it to heat up and produce light.
When an energy source (battery) is connected to a circuit, electrons in the conducting wire:
Push or repel electrons nearby and start the flow.
What do insulators do? What are they?
a material in which electric current does not flow freely
Insulators resist electron flow greatly and have high resistance
