Unit 3 Circuit Electricity Key Terms Flashcards
Electric Current
Rate of flow of charge
Amount of charge per second flowing past a given point
Ampere (A)
Base unit of electric current
Defined in terms of he force between 2 parallel wires each carrying a current of 1A
Kirchoff’s First Law
Total current arriving at any point in circuit = total current leaving it
Charge Carrier
Electron that is detached from its ion
Ion in a conducting material that’s free to flow to create a current
Potential Difference Between Two Points In A Circuit
Electrical energy per unit charge converted into other forms of energy
EMF of an electrical source
Energy per unit charge converted into electrical energy by the source
Ohm’s Law
In metals, current is proportional to potential difference if temperature remains constant
Resistance
Opposition to the flow of electrical current or flow of charge
Internal Energy Of A Body
Sum of potential energy and kinetic energy of its molecules
Conservation Of Energy
Energy cannot be created or destroyed but merely changed from one form to another
Resistance of cell or power supply
Opposes flow of charge through the cell. Some energy converted by the cell or power supply will be used up in the cell to overcome internal resistance
Drift Velocity
Mean velocity of charge carriers
