# Electrical Circuits Terms

 oppositions: resistorscapacitors The voltage drop in an inductor due to opposition is dictated by: current L= inductance the property of an electric circuit as a result of which an electromotive force is created by a change of current in the same circuit inductance a property of a conductor by virtue of which the passage of current is opposed, causing electric energy to be transformed into heat: resistance equal to the voltage across the conductor divided by the current flowing in the conductor resistance element where voltage and current are in phase w/ peak values purely resistive element the opposition of inductance and capacitance to alternating current, expressed in ohms: reactance equal to the product of the sine of the angular phase difference between current and voltage and the ratio of the effective voltage to the effective current reactance X= reactance the total opposition to alternating current by an electric circuit impedance equal to the square root of the sum of the squares of the resistance and reactance of the circuit and usually expressed in ohms impedance the flow of current source and magnetic field opposition iL= current in ac circuits A measure of the ability of a configuration of materials to store electric charge. capacitance the number of cycles or completed alternations per unit time of a wave or oscillation. frequency the number of periods or regularly occurring events of any given kind in unit of time, usually in one second. frequency the number of times that a periodic function or vibration repeats itself in a specified time, often 1 second. It is usually measured in hertz ν, f frequency electric potential difference between two points of an electric field. voltage the drop of electrical potential or potential difference on the load in an electrical circuit. voltage drop ω = angular velocity measured in radians per second (rad/s)2pif RMS effective current the rate of energy consumption in an electrical circuit electrical power The power that is used to do the work on the load real powerP = Vrms Irms cos φ the power that is wasted and not used to do work on the load reactive powerQ = Vrms Irms sin φ the power that is supplied to the circuit Apparent powerS = Vrms Irms P^2 + Q^2 = S^2 Real power, reactive power and apparent power The ratio of the real power that is used to do work and the apparent power that is supplied to the circuit: The power factor can get values in the range from 0 to 1. When all the power is reactive power with no real power (usually inductive load) - the power factor is 0 When all the power is real power with no reactive power (resistive load) - the power factor is 1 AC: equal to the absolute value of the cosine of the apparent power phase angle φ (which is also is impedance phase angle): Power factor energy is directly transferred by the movement of electrons or ions conductive Energy is transferred by electromagnetic field inductive Authorlacythecoolest ID301009 Card SetElectrical Circuits Terms Descriptionbasic electronic terms Updated2015-04-18T08:58:18Z Show Answers