Formulas and Vocab Flashcards
Percent Efficiency
E out x 100%
——-
E in
Calculating Electrical Power
E(J)
– = P(W)
T(S)
Ohms Law
V=I R
How to find the Current
Q
— = I
T
Source
Where electrons originate from (Battery and wall outlets)
Load
Device that converts electrical energy to another form of energy(Tv, Radio, Motor)
Control Device
Device that controls the flow of electric current this can be for safety to stop too much prevent to many electrons flowing through
Connectors
Provide a path of electrons to flow freely between the circuit(Wires)
Current
The rate of which electrons flow through in any given point
Potential Difference [voltage] (V):
How much work can potentially be done by a circuit think of it like a water pipe more water more pressure you add more battery you get more pressure
Potential Energy
Potential energy is stored energy that an object possesses due to its position or state. When released or allowed to move, this stored energy can be converted into other forms of energy, such as kinetic energy.
Energy
The energy possessed by each electron in a circuit is called electric potential (energy)
Secondary Cell
Rechargeable
Fuel Cell
Require a direct source of energy at all time
Primary Cell
Non-rechargeable because the chemical reaction that produces the flow of electrons is irreversible
Current Electricity
the controlled flow of electrons through a conductor from one place to another
Static
Static electricity refers to the build-up of electrical charges on the surface of an object, typically caused by the transfer of electrons between objects
Conductor
Allows electrons to flow through
Insulator
Does Not allow electrons to escape a conductor
Friction
When two materials are rubbed together, the electrons from one material can be transferred to the other, resulting in one material becoming negatively charged and the other becoming positively charged.
Conduction
Occurs when two objects with different amounts of electric charge come in contact and electrons move from one object to the other
Induction
Involves charging a neutral object by bringing another charged object close to, but NOT touching, the neutral object
Temporarily via induction
this way of charging offers a temporary charge to the object for example I have a negatively charged balloon and I bring it to a wall the wall will make the electrons move away making it temporarily negative (i.e. NOT permanent, will return to the original charge)
Grounding and permanently charging by induction
involves connecting an object to a large body, like Earth, that is capable of removing an electric charge that the object might have
