Magnetism
What is a magnetic field?
Area around magnetic pole where force is felt.
Device that detects electric charge on an object
Electroscope
What is a closed pathway that an electrical current follows?
Circuit
When electricity and magnetism meets it creates this
Electromagnet
V = I x R
Ohms Law
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
What is static electricity?
The build up of electric charges on an object.
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
Three 5 Ohm resistors are connected in series with a 12V power supply. How much current is going through each resistor?
0.8 Amp
What is current electricity?
The flow of electrons along a complete, closed path
What will decrease the strength of an electromagnet?
Less coils, less current
Making a non-magnetic object a magnet
Ferromagnetism
The force that causes electric charge to move is called?
Voltage difference
Two 10 Ohm resistors are connected in parallel to a 12V power supply. How much current is passing through each resistor?
.6 Amps
Which has more voltage, a circuit with:
15 amps current, 10 ohms resistance or
12 amps current, 12 ohms resistance?
The 15amp/10ohm circuit with 150 V voltage differential
When electrical current passes without contact
Induction