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Electric (electron) movement
Magnets
Going With the Flow
Circuits & Vocab
Vocabulary
100
What are the three sub-atomic particles that make up an atom? Identify the charge on each
What are protons (+), neutrons (0) and electrons (-)?
100
Magnets are materials in which the ___________ are aligned in the same direction.
What are domains?
100
This subatomic particle flows through the wire when an electric field is present.
What is an electron
100
What is the thing that closes and opens the current in a circuit. Draw the symbol of a switch in the off position.
What is a switch.
100
Materials, length of wire and diameter of wire determine the ________ part of Ohm's law
What is resistance.
200
The same number of positive particles as negative particles.
What is neutral?
200
North and south poles do this
What is attract
200
this is a path in which electric charges can flow.
What is an circuit.
200
How do circuit breakers function to protect us and our property?
What is they are switches that open a circuit when that circuit has too much current flowing through it. Too much current can pose a fire risk and damage electronics.
200
Electric Current move easily in these.
What are conductors
300
When objects experience friction, what charges are transferred? what charges remain stationary?
What electrons that are transferred and protons that are stationary?
300
In an electric generator there is a turbine connected to an axle with metal coils that are surrounded by magnets. Explain how these function to create electricity.
What is something needs to turn the turbine, which turns the metals coils within the magnets causing the electrons in the wire to move as they are attracted to the different poles in the magnets that surround. In short spinning metal wire within a magnet creates electric current. That energy needed to turn the turbine is often generated from burning fossil fuels, but could also be from wind/water.
300
Name things (2) that electrons flow easily through. Examples
What are conductors such as copper wire, metal poles, anything metal -- copper, silver, etc. Water is also a conductor
300
When a light bulb burns out in this circuit, others in the circuit will remain lit.
What is a parallel circuit?
300
Circuits with only one pathway for electric current to flow (one loop) and more than one load (like a light bulb) in that path.
What is a series circuit.
400
A charged object (an object with static electricity) can polarize a neutral object. Describe how a negatively charged object (like a balloon after rubbed against a wool sweater) can polarize a wall.
What is when the negative balloon approaches the wall, the electrons (negative charges) within the wall will move away from the balloon, leaving the outer surface of the wall slightly positive while the inner part of the wall is slightly negative.
400
These factors affect the strength of electromagnets are...
What are voltage of battery and the number of coils of wire around the materials because both increase the current/electric field around the metal.
400
What do we call materials that could slow the flow of electrons, include two examples
insulators: wood, plastic, rubber, air
400
Draw a parallel circuit with four lights and a switch that turns only two light off.
See teacher's key/review guide
400
A "load" in a circuit represents what part of ohm's law?
What is resistance
500
Describe the attractive forces that exist between charges and identify the direction of electric movement.
What is: oppositely charges attract and like charges repel and electric charge always moves from negative to positive. Charges move in this direction because like (negative charges) repel each pushing electrons away from a negative charge and they are attracted to a positive charge so they are pulled in that direction.
500
How do you form an electromagnet?
What is using current flowing through a wire coiled around a material containing iron, cobalt or nickel.
500
Ohms law describes the relationship between the three basic components of electricity in circuits. Name and describe each part of Ohm's law and either use the equation or an analogy to describe the relationship between each part.
What is current (I), voltage (V) and resistance (R). V=IR. where current is the flow of electrons from negative charge to positive charge; voltage is the push of electrons from an electrical potential difference in charge; and resistance is a force that opposes the flow of electrons/current based on the type of material the current is flowing through, the length of the wire (longer=greater resistance), the width of the wire (thinner=greater resistance). Analogy = circulatory system in which the heart (voltage) pumps the blood to make it flow (current) and the blood flows through blood vessels (resistance) which vary in length and diameter. In larger vessels (less resistance), more blood flows (greater current) assuming the heart beat is consistent. Also as our heart beats faster (greater voltage), blood will flow faster (increase current) through the blood vessels (constant resistance).
500
You have a simple circuit will a light that is emitting 10 lumens (of brightness). How much will two light bulbs emit, in lumens, if you add an additional light bulb to your circuit to form a series circuit with two light bulbs?
What is 5 lumens
500
This is a measure of the amount of electrical potential difference/push of electrons
What is voltage