Electricity
Learn what and how electricity works.
Current
Definition
An electric current is a flow of electric charge.Compare and contrast
Without a current you can't have a voltage, resistance, or power going
Real world example
When you use a wire letting one end touch the battery and the other touch the light bulb it makes the bulb light up and heats.
Voltage
An electromotive force or potential difference expressed in volts.
Compare and contrast
Voltage increases with the amount of the current flows.
Real world example
The voltage inside increases when the current is stronger.
Resistance
In electricity, a measurement of the difficulty encountered by a power source in forcing electric current through an electrical circuit, and hence the amount of power dissipated in the circuit. Resistance is measured in ohms.
Compare and contrast
The more resistance that you put on a current the less it flows through
Real world example
When you put resistance on a current that is flowing it makes it flow slower
Power
power is the rate of doing work. It is equivalent to an amount of energy consumed per unit time.
Compare and Contrast
If you don't have any work then you can't have a current.
Real world example
When your car breaks down in the middle of the road and you have to push it to the side of the road, you are using power.