Electrical Circuits Terms.txt

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Author:
jjman50
ID:
303829
Filename:
Electrical Circuits Terms.txt
Updated:
2015-06-08 20:43:25
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Electrical
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Electrical Terms
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  1. oppositions:
    • resistors
    • capacitors
  2. The voltage drop in an inductor due to opposition is dictated by:
    current
  3. L=
    inductance
  4. 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
  5. a property of a conductor by virtue of which the passage of current is opposed, causing electric energy to be transformed into heat:
    resistance
  6. equal to the voltage across the conductor divided by the current flowing in the conductor
    resistance
  7. element where voltage and current are in phase w/ peak values
    purely resistive element
  8. the opposition of inductance and capacitance to alternating current, expressed in ohms:
    reactance
  9. 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
  10. X=
    reactance
  11. the total opposition to alternating current by an electric circuit
    impedance
  12. 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
  13. the flow of current source and magnetic field
    opposition
  14. iL=
    current in ac circuits
  15. A measure of the ability of a configuration of materials to store electric charge.
    capacitance
  16. the number of cycles or completed alternations per unit time of a wave or oscillation.
    frequency
  17. the number of periods or regularly occurring events of any given kind in unit of time, usually in one second.
    frequency
  18. 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
  19. electric potential difference between two points of an electric field.
    voltage
  20. the drop of electrical potential or potential difference on the load in an electrical circuit.
    voltage drop
  21. ω =
    • angular velocity measured in radians per second (rad/s)
    • 2pif
  22. RMS
    effective current
  23. the rate of energy consumption in an electrical circuit
    electrical power
  24. The power that is used to do the work on the load
    • real power
    • P = Vrms Irms cos φ
  25. the power that is wasted and not used to do work on the load
    • reactive power
    • Q = Vrms Irms sin φ
  26. the power that is supplied to the circuit
    • Apparent power
    • S = Vrms Irms
  27. P^2 + Q^2 = S^2
    Real power, reactive power and apparent power
  28. 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.
  29. When all the power is reactive power with no real power (usually inductive load) - the power factor is
    0
  30. When all the power is real power with no reactive power (resistive load) - the power factor is
    1
  31. 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
  32. energy is directly transferred by the movement of electrons or ions
    conductive
  33. Energy is transferred by electromagnetic field
    inductive

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