Vocabulary and Concepts
“Like charges repel, unlike charges attract.” We call this the ________________________________.
Basic law of charges
This device allowed people to communicate at the speed of light for the first time.
Telegraph
DAILY DOUBLE!!
What type of current is better for long range power transmission and why?
These are the subatomic particles that move to create electrical currents.
Electrons
This is the kind of energy that makes physical objects move
Mechanical
This is what you call something that allows electrons to flow through it easily.
Conductor
This device sends sounds over long distances using very small electromagnets to vibrate a surface.
Telephone
This is the kind of current a battery generates.
DC or direct current
This is another word for an incomplete circuit
Open circuit
Light is this kind of energy
Electromagnetic
This is the unit for measuring how much a substance resists electric current.
Ohm
This device converts electromagnetic energy into mechanical energy.
A motor
The unit that measures the “pressure” or “pushing force” on electrons.
Volts/voltage
A "short" circuit is missing one of these
A load
This is the energy that is release when splitting an atom
Nuclear
What are the three particles that make up atoms? Bonus points for also saying what each of their charges is.
Proton - positive
Electron - negative
Neutron - neutral/no charge
This device uses two different kinds of metal separated by an acidic substance to create an electrical current.
Voltaic pile/battery
Distance will increase THIS force in a wire; thicker conductors decrease it.
Resistance
A circuit with multiple pathways is called what?
Parallel
A candle gives off this kind of energy
Heat
Explain the difference between electromagnetism and electromagnetic induction.
Electromagnetism - electrical currents produce magnetic fields
Electromagnetic Induction - Magnetic fields moved through a conductor produce an electrical current
This is the part of a motor that is necessary to allow its rotor to spin, which it does by turning the flow of electrons on and off automatically.
Commutator
A generator converts THIS type of energy into electricity by spinning a conductor through a magnetic field.
Kinetic/mechanical energy
This part of a circuit isn’t strictly necessary to allow current to flow, but it does allow one to control the circuit.
A switch
This is the kind of energy you get from digesting food
Chemical