DC Circuits Flashcards
Source
A device that converts other kinds of energy into electrical energy
Resistance
The opposition to the flow of electric current in a conductor
Voltage
Electrical potential difference
EMF
The voltage a source provides to a circuit
Current
The flow of electrons through a conductor
Electric power
The rate at which a resistor converts EPE into another kind of energy
Electric energy
The amount of energy converted by a resistor in a certain amount of time
Series combination
A group of resistors where the current must flow through all resistors
Parallel combination
A group of resistors that are connected to common points or junctions
Equivalent resistors
The combined resistance of a combination of resistors
Junction
A point in a circuit where two wires connect and produce two possible paths for the current
Circuit loop
Any closed path in a circuit that had no junctions
DC
Current that only flows on the same direction
AC
Current that changes directions periodically
Elastic charge
Total charge of all electrons that pass through a conductor in a certain amount of time
Ohms law
Current through a resistor is directly proportional to the voltage across the resistor and inversely proportional to the resistance of the resistor
Amp
Unit of electric current
Ohm
Unit of electrical resistance
Watt
Unit of electrical power
Joule
Unit of electrical energy
Kilowatt-hour
kWh unit of commercial electrical energy
Junction law
The total current i to any junction must equal the total current out of the junction
Loop law
The sum of the voltage drops across the resistors must equal the voltage of the source
Circuit
A combination of source and resistor(s) connected by conductors so there is at least one unbroken path from the source through the resistors and back to the source
