Electricity Textbook Goodnotes Recap Flashcards
Current?
Rate of flow of charge in a circuit and is measured in amperes
Charge?
What is carried through wires by electrons and is measured in coulombs
Charge equation?
Charge = Current x Time
ΔQ = I x ΔT
Coulomb?
The amount of charge that passes in one second per ampere of current
Current Measurement?
Current is measured using an ammeter which has to be placed in series
Power Source?
What allows electric charge to flow through a circuit due to energy being transferred to the charge
Electric Potential Energy?
When charge flows through a power source its raised through a potential as the energy is transferred to the charge
Work Done?
Another name for work done is energy transferred and is what a power source uses to move charge around the circuit
Potential Difference?
Where work done moves a unit of charge between 2 points and has the unit of volts
Potential Difference equation?
V = W / Q
Potential Difference = Work Done / Charge
Volt?
1 joule of energy being converted to move 1 coulomb of charge through a circuit or component and also has the unit name of joule per coulomb
Voltmeter?
What is used to measure the potential difference of an electrical component and has to be set up in a parallel configuration with the component being measured
Current and Potential Difference relationship?
When an electrical component has a potential difference it will cause current to flow around a circuit but the amount of current it receives depends on the components resistance
Resistance?
The measure of opposition to get current to flow through a component or circuit and is measured in ohms which has the symbol Ω
Ohm?
A component has a resistance of 1 ohm if 1 volt causes 1 amp to flow through a circuit
Resistance Equation?
R = V / I
Resistance = Potential Difference / Current
Ohm’s Law?
When current and potential difference have a directly proportional relationship creating a straight line relationship on a graph and is only true for ohmic conductors under constant physical conditions
I-V characteristics?
Show how current flowing through a component changes as the potential difference across a component changes
I-V characteristics relationship with resistance?
The shallower the gradient produced the greater the resistance of the component. Resistance is the negative reciprocal of the gradient of the graph produced. A curved gradient means resistance is not constant for the component.
Ideal Voltmeter?
Infinite resistance meaning no current is able to flow through it
Ideal Ammeter?
No resistance or potential difference
Ohmic Conductor results?
The current has a directly proportional relationship with voltage under constant physical conditions with resistance being constant as its the gradient
Ohmic Conductor example?
An example of an ohmic conductor is a metallic conductor
Filament Lamp I-V characteristics?
A curve that starts steep but gets shallower as the voltage rises and curves in the opposite direction when in the negative axis