Electrical Fundamentals Flashcards
Define Electricity
Electricity is a fundamental form of energy involving the existence of charges.
Define Current
The flow of charges along a closed conducting path.
Define Resistance
the opposition that charges encounter when moving through material
Define Voltage
Electromotive force or a difference in electrode potentials between two points
Define Power
The rate of energy used by an electrical device.
List symbols for current
I , A
List symbols for Resistance
R
List symbols for Voltage
E, V
List symbols for Power
P, W
What is the unit measurement of Current
Amps
What is the unit measurement of Resistance
Ohms
What is the unit measurement of Voltage
Volts
What is the unit measurement of Power
Watts
In words what does Ohms law describe
The relation between the ratio of voltage and current, to the resistance of a circuit.
Define Circuit
A complete and closed path around which electrical current can flow.
Define Series Circuit
A circuit where, the same current flows in one, consecutive, and continuous path from the source of voltage through various loads and back to the source
Define Parallel Circuit
A circuit where voltage across each circuit elements is the same.
Define Conventional Current
The flow of positive charges around a circuit. From positive to negative.
Kirchhoff’s Voltage Law
The sum of the source voltages around any closed loop is equal to the sum of the voltages drops across the resistance in that loop.
Kirchhoff’s current law
As much current flows away from a point as flows towards it.
