Electricity
The flow of electrical charge as a result of a buildup of electrons.
Electricity
What is the purpose of a switch?
To open (turn off) and close (turn on) the circuit.
What navigation tool uses magnets to identify direction?
A compass
Generators require the use of magnets in which like poles will do what?
Repel
Silver, aluminum, and iron are elements but also examples of what?
Conductors.
What part of an atom can move from one atom to the next?
Electrons
What is the difference between conductors and insulators?
Conductors allow the flow of electrons and insulators prevent the flow or electrons.
Where are magnetic fields the strongest on a magnet?
At the poles (south or north end)
True or False:
Generators transform mechanical energy into electrical energy?
True
Glass, plastic, rubber, wood are all examples of what?
Insulators
If an object has an excess number of electrons, what type of charge does it have?
Negative
What type of current is produced by a battery?
**Double points if you can name the type of current produced by a typical home outlet?
Battery - Direct Current
Home Outlet - Alternating Current
What three components are needed to make an electromagnet?
Iron core, coiled wire, and battery(electrical current)
What device transforms electrical energy into mechanical energy?
Electric Motor
What is the unit of measurement for voltage?
**double and ***triple points if you tell me the units of measurement for current and resistance.
Volts, amps, ohms
What is the rapid build up of electrons from friction?
Static Electricity
What is the difference between a series circuit and a parallel circuit?
Series circuit- Allows one path for a current to flow
Parallel circuit - Allows multiples paths for a current to flow
What is 1 of the 3 naturally occurring elements that may be found in permanent magnets?
**Double points if you name all 3.
Nickel, Iron, Cobalt
What type of magnet is used in a generator?
Electromagnet
As the amount of resistors in a circuit increase then the electric current will _____________
decrease
Lightning is an example of an electrical __________ that allows for equilibrium between positive and negative charges.
Discharge
What are the stream of electrons that allow us to harness electricity called?
Currents
What is stronger, a permanent magnet or an electromagnet?
Electromagnet
What are multiple armatures used for in an electric motor?
Allows for continuous spinning.
What century was the first electric vehicle created?
1800s or 19th century