Magnetism
What is a magnetic field?
Area around magnetic pole where force is felt.
Device that detects electric current
Ammeter
What is a closed pathway that an electrical current follows?
Circuit
When electricity and magnetism meets it creates this
Electromagnet
Styrofoam, wood and plastic do not conduct electricity well and are also known as ______________
Insulators
When two magnets are pulled toward each other they...
Attract
A substance through which electricity flows
Conductor
SI unit for electrical current
Ampere
Where do you find electromagnets?
Motors and generators
What does the Law of Conservation of Charges state?
Charges cannot be created or destroyed, only transferred
When two magnets are forced away from each other its called this
Repel
This substance blocks the flow of electricity
Insulator
Types of circuits are
Parallel & Series Circuits
True or False
The magnetosphere protects the earth from the sun's radiation.
True
the magnetosphere is the magnetic sphere generated by earth's spinning iron core
What ways do we protect from surges or overheating in electrical current?
Uses fuses and circuit breakers to stop the flow, also grounding wires for the building
The two ends of a magnet are called...
Poles
Electricity is the flow of...
Electrons
What is the unit for resistance?
The Ohm
What is current electricity?
The flow of electrons along a complete, closed path
Lightning is what type of electricity?
Static
True or False
Magnets will stick to ALL metals
False
Only to iron, nickle and cobalt
What is static electricity?
A build up of charges
State Ohm's law (equation)
voltage = current x resistance
(V = I x R)
Like charges______________
Opposite charges______________
Like charges REPEL
Opposite charges ATTRACT
When electrical current passes without contact
Induction