DC CIRCUITS

Question 1

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

Answer 1

-ELECTRICAL CIRCUIT

Question 2

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

Answer 2

-DIRECT CURRENT

Question 3

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

Answer 3

-LINEAR CIRCUIT

Question 4

Is that circuit whose parameters change with voltage and current.

Answer 4

-NON LINEAR CIRCUIT

Question 5

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

Answer 5

-BILATERAL CIRCUIT

Question 6

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

Answer 6

-UNILATERAL CIRCUIT

Question 7

Connection of various electric elements in any manner

Answer 7

-ELECTRICAL NETWORK

Question 8

With no source of emf.

Answer 8

-PASSIVE NETWORK

Question 9

Contains one or more than one sources of emf.

Answer 9

-ACTIVE NETWORK

Question 10

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

Answer 10

-IDEAL VOLTAGE SOURCE

Question 11

is independent of the voltage between its terminals.

Answer 11

-IDEAL CURRENT SOURCE

Question 12

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

Answer 12

-INDEPENDENT SOURCES

Question 13

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

Answer 13

-DEPENDENT SOURCES

Question 14

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

Answer 14

NODE

Question 15

Part of a network which lies between two junctions.

Answer 15

BRANCH

Question 16

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

Answer 16

LOOP

Question 17

A loop that contains no other loop within it.

Answer 17

MESH

Question 18

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).

Answer 18

-CURRENT

Question 19

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.

Answer 19

DIRECT CURRENT

Question 20

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

Answer 20

Varying direct current (Vdo) -

Question 21

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

Answer 21

Pulsating direct current (Pdc)

Question 22

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

Answer 22

Interrupted direct current (idc)

Question 23

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.

Answer 23

-ALTERNATING CURRENT

Question 24

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

Answer 24

-CONVENTIONAL CURRENT

Question 25

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

Answer 25

-ELECTRON FLOW

Question 26

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.

Answer 26

-VOLTAGE

Question 27

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

Answer 27

-RESISTANCE

Question 28

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

Answer 28

-OHM’s LAW

Question 29

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

Answer 29

-JOULE’S FIRST LAW

Question 30

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

Answer 30

-SERIES CIRCUITS

Question 31

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

Answer 31

-PARALLEL CIRCUITS

Question 32

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

Answer 32

-KIRCHHOFF'S LAWS

Question 33

A sophisticated application of KVL with mesh currents.

Answer 33

-MESH ANALYSIS

Question 34

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

Answer 34

-NODAL ANALYSIS

Question 35

a node with three or more circuit elements joined together.

Answer 35

-PRINCIPAL NODE

Question 36

the node from which the unknown voltages are measured.

Answer 36

-REFERENCE NODE

Question 37

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.

Answer 37

-SUPERPOSITION THEOREM

Question 38

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.

Answer 38

-COMPENSATION THEOREM

Question 39

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.

Answer 39

-RECIPROCITY THEOREM

Question 40

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. "

Answer 40

-MILLMAN'S THEOREM

Question 41

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.

Answer 41

-MAXIMUM POWER TRANSFER THEOREM

Question 42

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).

Answer 42

-THEVENIN'S THEOREM

Question 43

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

Answer 43

-VTH

Question 44

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.

Answer 44

-RT

Question 45

" 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).*

Answer 45

-NORTON'S THEOREM

Question 46

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

Answer 46

-In

Question 47

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

Answer 47

-Rn

Question 48

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.

Answer 48

-DELTA to WYE

Question 49

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.

Answer 49

-WYE to DELTA