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Review For Board Exam > DC CIRCUITS > Flashcards

DC CIRCUITS Flashcards

1
Q

A closed conducting path through which an electric current flows or is intended to flow.

A

-ELECTRICAL CIRCUIT

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2
Q

is an electric current that has no variation in amplitude (strength) of the current or voltage. One that remains constant with time.

A

-DIRECT CURRENT

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3
Q

Is one whose parameters are constant (i.e. They do not change with voltage and current.

A

-LINEAR CIRCUIT

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4
Q

Is that circuit whose parameters change with voltage and current.

A

-NON LINEAR CIRCUIT

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5
Q

Is one whose properties or characteristics are the same in either direction.

A

-BILATERAL CIRCUIT

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6
Q

Is that circuit whose properties or characteristics change with the direction of its operation.

A

-UNILATERAL CIRCUIT

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7
Q

Connection of various electric elements in any manner

A

-ELECTRICAL NETWORK

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8
Q

With no source of emf.

A

-PASSIVE NETWORK

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9
Q

Contains one or more than one sources of emf.

A

-ACTIVE NETWORK

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10
Q

supplies power at a constant voltage, regardless of the current drawn.

A

-IDEAL VOLTAGE SOURCE

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11
Q

is independent of the voltage between its terminals.

A

-IDEAL CURRENT SOURCE

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12
Q

deliver volatge and current at thier rated values regardless of circuit parameters.

A

-INDEPENDENT SOURCES

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13
Q

deliver volatge and current at levels determined by a voltage or current elsewhere in the circuit.

A

-DEPENDENT SOURCES

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14
Q

A junction in a circuit where two or more circuit elements and/or branches are connected together.

A

NODE

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15
Q

Part of a network which lies between two junctions.

A

BRANCH

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16
Q

A closed path in a circuit in which no element or node is encountered more than once.

A

LOOP

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17
Q

A loop that contains no other loop within it.

A

MESH

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18
Q

A progressive movement of free electrons along a wire or other conductor.
Also defined as the time rate of change of charge, measured in amperes (A).

A

-CURRENT

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19
Q

One in which there is no variation in amplitude (strength) of the current or voltage such as those generated from batteries, dc generators, and power supplies.

A

DIRECT CURRENT

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20
Q

One in which the amplitude of the current or voltage varies but never falls to zero.
Found in many transistor and vaccum-tube circuits.

A

Varying direct current (Vdo) -

21
Q

One in which the amplitude drops to zero periodically. Obtained in rectifier circuits.

A

Pulsating direct current (Pdc)

22
Q

One in which current or volatge starts and stops abruptly (square wave). Produced by vibrators, choppers, and special oscillator circuits.

A

Interrupted direct current (idc)

23
Q

Is a form of electricity that flows in an alternating directions and/or possessing a voltage with alternating polarity over time.
This is the usual house current.

A

-ALTERNATING CURRENT

24
Q

assumes that current flows out of the positive terminal, through the circuit and into the negative terminal of the source.

A

-CONVENTIONAL CURRENT

25
Q

electrons flow out of the negative terminal, through the circuit and into the positive terminal of the source.

A

-ELECTRON FLOW

26
Q

Also known as electromotve force (emf) or potential difference is the elctron - moving force in a circuit that pushes and pulls electrons (current) through the circuit.

A

-VOLTAGE

27
Q

Is the opposition to current flow. To add resistance to a circuit, electrical components called resistors are used.

A

-RESISTANCE

28
Q

One of the most fundamental law in electrical circuits relating voltage, current and resistance

A

-OHM’s LAW

29
Q

also known as the Joule effect, is a physical law expressing the relationship between the heat generated by the current flowing through a conductor.

A

-JOULE’S FIRST LAW

30
Q

A circuit connection in which the components are connected to form one conducting path

A

-SERIES CIRCUITS

31
Q

A circuit connection in which the components are connected to form more than 1 conducting path

A

-PARALLEL CIRCUITS

32
Q

More comprehensive than Ohm’s Law and is used in solving electrical Termed as “Laws of Electric Networks” Formulated by German physicist

A

-KIRCHHOFF’S LAWS

33
Q

A sophisticated application of KVL with mesh currents.

A

-MESH ANALYSIS

34
Q

A systematic application of KCL at a node and after simplifying the resulting KCL equation.

A

-NODAL ANALYSIS

35
Q

a node with three or more circuit elements joined together.

A

-PRINCIPAL NODE

36
Q

the node from which the unknown voltages are measured.

A

-REFERENCE NODE

37
Q

The current through or voltage across, an element in a linear bilateral network is equal to the algebraic sum of the current or voltages produced independently in each
source.

A

-SUPERPOSITION THEOREM

38
Q

If the impedance Z of a branch in a network in which a current I flows is changed by a finite amount dZ, then the change in the currents in all other branches of the network may be calculated by inserting a voltage source of Idz into that branch with all other voltage sources replaced by their internal impedances.

A

-COMPENSATION THEOREM

39
Q

If a voltage source E acting in one branch of a network causes a current I to flow in another branch of the network, then the same voltage source E acting in the second branch would cause an identical current I to flow in the first branch.

A

-RECIPROCITY THEOREM

40
Q

A special case of the application of Thevenin’s Theorem/or Norton’s Theorem used for finding the COMMON voltage (VAs) across a network which contains a number of parallel voltage sources. “

A

-MILLMAN’S THEOREM

41
Q

For loads connected directly to a DC voltage supply, maximum power will be delivered to the load when the resistance is equal to the internal resistance of the source.

A

-MAXIMUM POWER TRANSFER THEOREM

42
Q

Any two-terminal of a linear, active bilateral network of a fixed resistances and voltage source/s may be replaced by a single voltage source (VTH) and a series of internal resistance (RTH).

A

-THEVENIN’S THEOREM

43
Q

the open circuit voltage which appears across the two terminals from where the load resistance has been removed.

A

-VTH

44
Q

the resistance looking back into the network across the two terminals with all
the voltage sources shorted and
replaced by their internal resistances (if any) and all current sources by infinite resistance.

A

-RT

45
Q

” Any two-terminal active network containing voltage sources and resistances when viewed from its output terminals, is equivalent to a constant-current source (In) and a parallel internal resistance (RN).*

A

-NORTON’S THEOREM

46
Q

the current which would flow in a short circuit placed across the output terminals.

A

-In

47
Q

the resistance of the network when viewed from the open circuited terminals after
all voltage sources being replaced by
open circuits.

A

-Rn

48
Q

The equivalent resistance of each arm to the wye is given by the PRODUCT of the two delta sides that meet at its end divided by the SUM of the three delta resistances.

A

-DELTA to WYE

49
Q

The equivalent delta resistance between any two twrminals is given by the SUM of a star resistance between those terminals PLUS the PRODUCT of these two star resistances DIVIDED by the third resistance.

A

-WYE to DELTA

Review For Board Exam (17 decks)

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