Electric Charge
Electric Current
Circuits
Magnetism
Electromagnets
100
A closed path that electricity flows through.
Circuit
100
Materials that allow electrons to freely flow are called…
Conductors
100
Describe the differences between series and parallel circuits.
Series- 1 pathway, all lights go out if one goes out
Parallel- 2 pathways, all lights stay on if one goes out
100
Two North magnets will do this.
Repel
100
What are the components of an electromagent?
Piece of iron (nail)
Wire (copper)
200
Negative particles in an atom that are used to produce electricity
Electrons
200
Tendency of an object to oppose the flow of electrons
Resistance
200
Draw a series circuit with 1 battery, a closed switch, an ammeter, a resistor, and a light bulb.
200
Where the magnetic field is strongest in a magnet.
At the poles
200
Temporary magnet made by placing a piece of metal, like iron, in a current-carrying coil of wire.
Electromagnet
300
Build up of electricity or electric charge
Static Electricity
300
Net movement of electrons in a single direction
Current
300
Draw a parallel circuit with 2 batteries, 2 light bulbs on separate branches, and an open switch to turn one of the light bulbs off.
300
What is a magnetic force? Explain it using North and South magnetic poles.
A force is a push or pull
Opposites attract, Like charges repel (N attracts S, N repels N, S repels S)
300
The stronger the current, the _____ magnetic field in an electromagnet.
Stronger
400
Device that detects electrical charge.
Electroscope
400
Describe the way electrons move
Like a bunch of bouncy balls thrown down stairs (aka, crazily)
400
Describe two ways to prevent a circuit from overheating.
1. Fuse = piece of metal that melts to open circuit and prevent current from flowing
2. Circuit breaker = piece of metal that bends to open circuit and prevent current from flowing.
400
Explain Magnetic Domains.
Aligned- magnetic (ex. iron)
Not aligned- not magnetic (ex. pencil)
400
Two ways to increase the strength of an electromagnet.
Increase the number of coils/loops
Increase the strength of the current
500
How does lightning work?
Moving clouds create a build up of static electricity. Charge becomes so great it induces a positive charge on ground. Attraction eventually becomes so strong e- travel to earth (in the bolt) to neutralize.
500
The push that causes charges to move.
Voltage Difference
500
List the four factors that can affect the resistance in a circuit and explain how each can increase the amount of resistance.
Material (insulators increase resistance)
Length (longer wires increase resistance)
Size (thinner wires increase resistance)
Temperature (hotter wires increase resistance)
500
Explain Ferromagnetism. Give an example.
phenomenon where objects placed in a strong magnetic field become magnetized due to the poles within their atoms aligning
Holding a nail near a strong magnet
500
What energy conversion occurs inside a generator?
Mechanical energy đŸ¡ª electrical energy
(using an electromagnet)