Electricity Flashcards
Basic journey of electricity
Its created at a *generating station
Then sent off by high voltage wires, the voltage then reduced by a *substation. It then moves through smaller, lower voltage wires that can now service homes going through a circuit on a round trip.
Whats a magnetic field
An invisible area where the effect of a magnetic material or force can be found
Electro magnetic force is defined as?
The physical interaction that occurs between charged particles moving down a wire.
Where is the effect of a magnetic material/force found?
The magnetic field
Whats it called when interacting, charged particles move down a wire?
Electromagnetic force
When a negative charge moves throughout a wire, it….?
Creates a magnetic field around the wire.
How do you make a magnetic field around a wire?
Have negative charges (electrons) move through a wire.
Changing the direction of the current flow changes the_____?
Direction of the magnetic field
To change the direction of the magnetic field (essentialy the way/direction the magnetic field flows in) you__________?
Change the direction of the current flow. Instead of - to + it will now move + to -
List ways the strength/size of the magnetic field can be changed.
- switching material
- shape of wire
- voltage(not in notes)
- more coils
More coils create a _______
Stronger magnetic field
Most common wire material used in an electromagnetic?
Copper: its easy to work with and hard to melt.
Common core material?
Iron, partly due to its natural magnetic properties.Did you know it can be wrapped around air?
A thicker wire can carry more ____
Current, the thicker the wire, the more current (electricity/voltage) it can handle
The two basic steps if building an electromagnetic are?
- wrap the copper wire in one direction around the metal core
- connect the lose ends if your wire, there should be around 15 cm at the ends, to a battery/power supply.
