Electromagnetism
A current/moving electric charge
How are magnetic fields around a wire created?
DC (Direct Current)
What current is found in small devices?
An electric current that follows one direction only
What is a Direct Current?
A circuit with only one path to follow
What is a series circuit?
Voltage equals Current multiplied by Resistance
What is the formula for Ohm's Law?
A device that uses motion and magnets to create electricity
What is a generator?
Parallel Circuits
What kind of circuit is used in most home wiring?
A current that changes direction periodically
What is an Alternating Current?
A circuit that has multiple paths
What is a parallel circuit?
The unit resistance is measured in
What are Ohms?
A coil that acts as a magnet when an electric current is present and flowing through it
What are electromagnets?
A material that prevents electricity from flowing through it
What is an insulator?
Batteries
What are Direct Currents mainly powered by?
Parallel Circuits
Which circuit type can give full voltage to all paths from the source?
Directly Proportional
What is the relationship between voltage and current?
Changing magnetic fields in a nearby wire
How is an electric/induced current created?
AC (Alternating Current)
What kind of current is used in large devices?
Alternating Current
Which type of current shows sine waves?
The current
What stays the same in multiple components of a series circuit?
The 'push' that drives electric charges through a circuit
What is voltage?
Transformers/electric generators
What is an example of electromagnetic induction?
MRI scanners, doorbells, motors and speakers
What devices use electromagnetism to function?
Household Outlets
Where are AC Currents mostly used?
Old Christmas Lights
What is an example of a series circuit?
Inversely Proportional
What is the relationship between current and resistance?