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Flashcards

Basic EE - Exam I

Emily Beck Engineering Inglês 70 flashcards

Basic EE - Exam I

Flashcards do conjunto (70)

  1. 1Ideal SourcesA source that can provide an arbitrary amount of energy - divided into two types: voltage sources and current sources
  2. 2Ideal Voltage SourceAn electric device that generates a prescribed voltage at its terminals
  3. 3Ideal Current SourceA device that can generate a prescribed current independent of the circuit
  4. 4Dependent (or controlled) SourceAnother category of sources whose output (current or voltage) is a function of some other voltage or current in a circuit
  5. 5Electrical Networka collection of elements through which current flows
  6. 6BranchAny portion of a circuit with two terminals connected to itBranch
  7. 7NodeThe junction of two or more branchesNode
  8. 8SupernodeThe defining of a region that encloses more than one nodeSupernode
  9. 9LoopAny closed connection of branches
  10. 10MeshA loop that does not contain other loops
  11. 11ChargeThe fundamental electric quantity of static electricity and the current that flows in metal wires connected to a battery
  12. 12Coulomb (C)Unit of current
  13. 13Elementary ChargeElectron and protons often referred to as
  14. 14Kirchhoff's current law (KCL)The sum of the currents at a node must equal zero - because charge cannot be created but must be conservedKirchhoff's current law (KCL)
  15. 15Electric CurrentThe time rate of change of charge passing through a predetermined areaElectric Current
  16. 16AmperesUnits of current where 1 ampere (A) = 1 coulomb/second
  17. 17In order for a current to flow, ________.there must exist a closed circuit
  18. 18VoltageThe total work per unit charge associated with the motion of charge between two points
  19. 19VoltsVolts
  20. 20Potential DifferenceThe voltage, or ___________, between two points in a circuit indicates the energy required to move charge from one point to the other.
  21. 21Kirchhoff's Voltage Law (KVL)the net voltage around a closed circuit is zero - no energy is lost of created in an electric circuitKirchhoff's Voltage Law (KVL)
  22. 22Reference VoltageIn a circuit, any one node may be chosen as the reference node
  23. 23SourcesThe elements that provide energy
  24. 24LoadsElements that dissipate energy
  25. 25Power =P=VIPower =
  26. 26i-v characteristic (or volt-ampere characteristic)A functional relationship between voltage and current
  27. 27ResistanceThe magnitude of which depends on the electrical properties of the material
  28. 28ResistorA device that exhibits linear resistance properties
  29. 29Ohm's LawThe voltage across an element directly proportional to the current flowOhm's Law
  30. 30ohms (Ω)Unit of resistance R
  31. 31ResistivityThe resistance of a material depends on resistivity (ρ)
  32. 32ConductivityInverse of resistivity (σ)Conductivity
  33. 33Conductance as inverse of resistanceConductance as inverse of resistance
  34. 34Ohm's law restate in terms of conductanceOhm's law restate in terms of conductance
  35. 35Power RatingThe maximum allowable power dissipationPower Rating
  36. 36Short CircuitA circuit element with resistance approaching zero
  37. 37Open CircuitA circuit element whose resistance approaches infinity
  38. 38In SeriesTwo or more circuit elements are said to be in series if the current from one element exclusively flows into the next elementIn Series
  39. 39EQ: Equivalent Series ResistanceEQ: Equivalent Series Resistance
  40. 40EQ: When the work done in moving Q from b to aEQ: When the work done in moving Q from b to a
  41. 41Voltage DividerThe voltage across each resistor in a series circuit is directly proportional to the ratio of its resistance to the total series resistance of the circuit
  42. 42EQ: Voltage DividerEQ: Voltage Divider
  43. 43In ParallelTwo or more circuit elements are said to be in parallel if the elements share the same terminalsIn Parallel
  44. 44EQ: Equivalent Parallel ResistanceEQ: Equivalent Parallel Resistance
  45. 45EQ: Current Divider RuleEQ: Current Divider Rule
  46. 46Ohmmeter RuleThe resistance of an element can be measured only when the element is disconnected from any other circuit
  47. 47OhmmeterDevice that measures resistanceOhmmeter
  48. 48AmmeterDevice that measures current flowingAmmeter
  49. 49Ammeter Rule1. Must be placed in series with the element whose current is to be measured
    2. Should not restrict the flow of current
  50. 50VoltmeterDevice that measures voltageVoltmeter
  51. 51WattmeterDevice that measures power dissipatedWattmeter
  52. 52Node voltage methodBased on defining the voltage of each node as an independent variable - one node is selected as a reference node
  53. 53Node Voltage Analysis MethodNode Voltage Analysis Method
  54. 54Mesh CurrentsWrite the appropriate number of independent equations, using mesh currents as the independent variables
  55. 55Mesh Current Analysis MethodMesh Current Analysis Method
  56. 56The Principle of SuperpositionIn a linear circuit containing N sources, each branch voltage and current is the sum of N voltages and currents, each of which may be computed by setting all but one source equal to zero and solving the circuit containing that single sourceThe Principle of Superposition
  57. 57One-Port NetworkA two-terminal device, described by and i-v characteristicOne-Port Network
  58. 58Equivalent CircuitA view of a very complicated circuit in terms of a much simpler equivalent source and load circuits
  59. 59The Thevenin TheoremWhen viewed from the load, any network composed of ideal voltage and current sources, and of linear resistors, may be represented by an equivalent circuit consisting of an ideal voltage source vt in series with an equivalent resistance RtThe Thevenin Theorem
  60. 60The Norton TheoremWhen viewed from the load, any network composed of ideal voltage and current sources, and linear resistors, may be represented by an equivalent circuit consisting of an ideal current source iN in parallel with an equivalent resistance RnThe Norton Theorem
  61. 61Computation of Equivalent Resistance of a One-Port Network That Does Not Contain Dependent SourcesComputation of Equivalent Resistance of a One-Port Network That Does Not Contain Dependent Sources
  62. 62Thevenin and Norton equivalent resistances are _________.one and the same quantityThevenin and Norton equivalent resistances are _________.
  63. 63Thevenin Equicalent VoltageEqual to the open-circuit voltage present at the load terminals (with the load removed).Thevenin Equicalent Voltage
  64. 64Computing the Thevenin VoltageComputing the Thevenin Voltage
  65. 65Norton CurrentEqual to the short-circuit current that would flow if the load were replaced by a short circuitNorton Current
  66. 66Computing the Norton CurrentComputing the Norton Current
  67. 67Source TransformationsAny circuit in Thevenin equivalent form may be replaced by a circuit in Norton equivalent formSource Transformations
  68. 68FIG: Equivalence of Thevenin and Norton RepresentationsFIG: Equivalence of Thevenin and Norton Representations
  69. 69EQ: Relationship for determining Thevenin resistanceEQ: Relationship for determining Thevenin resistance
  70. 70Maximum Power Transfer TheoremThe amount of power transferred to the load rom the source under the most ideal conditions

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Engineering FlashCards sobre Basic EE - Exam I, criado por Emily Beck em 16-02-2021.
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Emily Beck
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