You dont have javascript enabled! Please enable it! MCQ in DC Circuits Part 11 | REE Board Exam » Ace Your Board Exam with PinoyBIX

MCQ in DC Circuits Part 11 | REE Board Exam

This is the Multiple Choice Questions Part 11 of the Series in DC Circuits as one of the Electrical Engineering topic. In Preparation for the REE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electrical Engineering field, Electrical Engineering Books, Journals and other Electrical Engineering References.

Continue Practice Exam Test Questions Part 11 of the Series

NETWORK THEOREMS

Choose the letter of the best answer in each questions.

501.ย  Determineย  theย  valueย  ofย  nodeย  voltageย  V2.ย  All resistances are in ohms.

A.ย  14 V

B.ย  12 V

C.ย  0 V

D.ย  1 V

Solution:

502.ย  Whatย  shouldย  beย  theย  valueย  ofย  R soย  theย  resistorย  will receive the maximum power? All resistances are in ohms.

A.ย  10.0 ohms

B.ย  3.875 ohms

C.ย  0.968 ohms

D.ย  1.60 ohms

Solution:

503.ย  Determine the value VOย  in the ideal op-amp circuit below.

A.ย  -8 V

B.ย  -6 V

C.ย  -4 V

D.ย  -3 V

Solution:

504.ย  Determine the value VO in the op-amp circuit below.

A.ย  -4 V

B.ย  -8 V

C.ย  -2 V

D.ย  -3 V

Solution:

505.ย  If the voltage source (dependent or independent) is connectedย  betweenย  twoย  non-referenceย  nodes,ย  the two non-reference nodes form a ______.

A.ย  Common Node

B.ย  Supernode

C.ย  Complex Node

D.ย  Reference node

Solution:

506.ย  The theorem that states that โthe voltage across or current through an element in a linear circuit is the algebraicย  sumย  ofย  theย  voltagesย  acrossย  orย  current throughย  thatย  elementย  dueย  toย  eachย  independent source acting aloneโ.

A.ย  Superposition Theorem

B.ย  Theveninโs Theorem

C.ย  Nortonโs Theorem

D.ย  Reciprocity Theorem

Solution:

507.ย  Kirchhoffโs Current Law states that

A.ย  theย  algebraicย  sumย  ofย  theย  currentsย  flowingย  into any point in a circuit must equal zero

B.ย  the algebraic sum of the currentsย  entering and leaving any point in a circuit must equal zero

C.ย  the algebraic sum of the currents flowing away from any point in a circuit must equal zero

D.ย  theย  algebraicย  sumย  ofย  theย  currentsย  aroundย  any closed path must equal zero

Solution:

508.ย  When applying Kirchhoffโs Current Law,

A.ย  consider all the currents flowing into a branch pointย  positiveย  andย  allย  currentsย  directedย  away from that point negative

B.ย  considerย  all theย  currentsย  flowingย  intoย  aย  branch pointย  negativeย  andย  allย  currentsย  directedย  away from that point positive

C.ย  rememberย  thatย  theย  totalย  ofย  allย  theย  currents entering a branch point must always be greater than the sum of the currents leaving that point

D.ย  the algebraic sum of the currents entering and leavingย  aย  branchย  pointย  doesย  notย  necessarily have to be zero

Solution:

509.ย  Whenย  applyingย  Kirchhoffโsย  Voltageย  Law,ย  aย  closed path is commonly referred to as a

A.ย  node

B.ย  principal node

C.ย  loop

D.ย  branch point

Solution:

510.ย  Kirchhoffโs Voltage Law states that

A.ย  theย  algebraicย  sumย  ofย  theย  voltageย  sourcesย  and IR voltage drops in any closed path must total zero

B.ย  theย  algebraicย  sumย  ofย  theย  voltageย  sourcesย  and IRย  voltageย  dropsย  aroundย  anyย  closedย  pathย  can never equal zero

C.ย  theย  algebraicย  sumย  ofย  allย  theย  currentsย  flowing around any closed path must equal zero

D.ย  none of these

Solution:

511.ย  When applying Kirchhoffโs Voltage Law

A.ย  consider any voltage whose positive terminal is reachedย  firstย  asย  negativeย  andย  anyย  voltage whoseย  negativeย  terminalย  isย  reachedย  firstย  as positive

B.ย  always consider all voltage sources as positive and all resistor voltage drops as negative

C.ย  considerย  anyย  voltageย  whoseย  negativeย  terminal isย  reachedย  firstย  asย  negativeย  andย  anyย  voltage whoseย  positiveย  terminalย  isย  reachedย  firstย  as positive

D.ย  alwaysย  considerย  allย  resistorย  voltageย  dropsย  as positive and all voltage sources as negative

Solution:

512.ย  The algebraic sum of +40 V and -30 V is

A.ย  -10 V

B.ย  +10 V

C.ย  +70 V

D.ย  -70 V

Solution:

513.ย  A principal node is

A.ย  a closed path or loop where the algebraic sum of the voltages must equal zero

B.ย  theย  simplestย  possibleย  closedย  pathย  aroundย  a circuit

C.ย  aย  junctionย  whereย  branchย  currentย  canย  combine or divide

D.ย  none of these

Solution:

514.ย  Howย  manyย  equationsย  areย  necessaryย  toย  solveย  a circuit with two principal nodes?

A.ย  3

B.ย  2

C.ย  4

D.ย  1

Solution:

515.ย  Theย  differenceย  betweenย  aย  meshย  currentย  andย  a branch current is

A.ย  aย  meshย  currentย  isย  anย  assumedย  currentย  andย  a branch current is an actual current

B.ย  the direction of the current themselves

C.ย  aย  meshย  currentย  doesย  notย  divideย  atย  aย  branch point

D.ย  both A and B above

Solution:

516.ย  Using the method of mesh currents, any resistance common to two meshes has

A.ย  two opposing mesh currents

B.ย  one common mesh current

C.ย  zero current

D.ย  none of these

Solution:

517.ย  The fact that the sum of the resistor voltage drops equals the applied voltage in a series circuit is the basis for

A.ย  Kirchhoffโs Current Law

B.ย  node voltage analysis

C.ย  Kirchhoffโs Voltage Law

D.ย  the method of mesh currents

Solution:

518.ย  Theย  factย  thatย  theย  sumย  ofย  theย  individualย  branch currents equals the total current in a parallel circuit is the basis for

A.ย  Kirchhoffโs Current Law

B.ย  node voltage analysis

C.ย  Kirchhoffโs Voltage Law

D.ย  the method of mesh currents

Solution:

519.ย  Ifย  youย  doย  notย  goย  completelyย  aroundย  theย  loopย  when applying Kirchhoffโs Voltage Law, then

A.ย  theย  algebraicย  sumย  ofย  theย  voltagesย  willย  always be positive

B.ย  theย  algebraicย  sumย  isย  theย  voltageย  betweenย  the start and finish points

C.ย  theย  algebraicย  sumย  ofย  theย  voltagesย  willย  always be negative

D.ย  theย  algebraicย  sumย  ofย  theย  voltagesย  cannotย  be determined

Solution:

520.ย  A resistor is an example of a(n)

A.ย  bilateral component

B.ย  active component

C.ย  passive component

D.ย  both A and C

Solution:

521.ย  Toย  applyย  Superpositionย  theorem,ย  allย  components must be

A.ย  the active type

B.ย  both linear and bilateral

C.ย  grounded

D.ย  both nonlinear and unidirectional

Solution:

522.ย  When converting from a Norton-equivalent circuit to a Thevenin equivalent circuit or vice versa

A.ย  RN and RTH have the same value

B.ย  RN will always be larger than RTH

C.ย  IN is shorted-circuit to find VTH

D.ย  VTH is short-circuited to find IN

Solution:

523.ย  Whenย  solvingย  forย  theย  Theveninย  equivalent resistance, RTH,

A.ย  all voltage sources must be opened

B.ย  all voltage sources must be short-circuited

C.ย  allย  voltageย  sourcesย  mustย  beย  convertedย  to current sources

D.ย  none of these

Solution:

524.ย  Theveninโsย  Theoremย  statesย  thatย  anย  entireย  network connectedย  toย  aย  pairย  ofย  terminalsย  canย  beย  replaced with

A.ย  a single current source in parallel with a single resistance

B.ย  a single voltage source in parallel with a single resistance

C.ย  aย  single voltage sourceย  inย  seriesย  withย  a single resistance

D.ย  aย  singleย  currentย  sourceย  inย  seriesย  withย  aย  single resistance

Solution:

525.ย  Nortonโsย  Theoremย  statesย  thatย  anย  entireย  network connectedย  toย  aย  pairย  ofย  terminalsย  canย  beย  replaced with

A.ย  a single current source in parallel with a single resistance

B.ย  a single voltage source in parallel with a single resistance

C.ย  aย  single voltage sourceย  inย  seriesย  withย  a single resistance

D.ย  aย  singleย  currentย  sourceย  inย  seriesย  withย  aย  single resistance

Solution:

526.ย  Withย  respectย  toย  terminalsย  Aย  andย  Bย  inย  aย  complex network, the Thevenin voltage, VTH, is

A.ย  theย  voltageย  acrossย  terminalsย  Aย  andย  Bย  when they are short-circuited

B.ย  the open-circuit voltage across terminals A and B

C.ย  the same as the voltage applied to the complex network

D.ย  none of these

Solution:

527.ย  Withย  respectย  toย  terminalsย  Aย  andย  Bย  inย  aย  complex network, the Norton current, IN, is

A.ย  theย  current flowing between terminals A and B when they are open

B.ย  the total current supplied by the applied voltage to the network

C.ย  zeroย  whenย  terminalsย  Aย  andย  Bย  areย  short-circuited

D.ย  theย  currentย  flowingย  terminalsย  Aย  andย  Bย  when they are short-circuited

Solution:

528.ย  Whichย  theoremย  providesย  aย  shortcutย  forย  findingย  the commonย  voltageย  acrossย  anyย  numberย  ofย  parallel branches with different sources?

A.ย  The Superposition Theorem

B.ย  Theveninโs Theorem

C.ย  Nortonโs Theorem

D.ย  Millmanโs Theorem

Solution:

529.ย  A d.c. circuit usually has ____ as the load

A.ย  Resistance

B.ย  Capacitance

C.ย  Inductance

D.ย  both inductance and capacitance

Solution:

530.ย  Electricalย  appliancesย  areย  connectedย  inย  parallel because it ____.

A.ย  is a simple circuit

B.ย  draws less current

C.ย  results in reduce in power loss

D.ย  makes the operation of appliances independent of each other

Solution:

531.ย  The purpose of load in an electric circuit is to ____

A.ย  increase the circuit current

B.ย  utilize electrical energy

C.ย  decrease the circuit current

D.ย  none of these

Solution:

532.ย  A passive network has

A.ย ย ย  no emf source

B.ย ย ย  no current source

C.ย  neither emf nor current source

D.ย  none of these

Solution:

533.ย  The relationship between voltage and current is the same for two opposite directions of current in case of

A.ย ย ย  bilateral network

B.ย ย ย  active network

C.ย  unilateral network

D.ย  passive network

Solution:

534.ย  Which of the following statement is not correct?

A.ย ย ย  voltage source is an active element

B.ย ย ย  current source is a passive element

C.ย  resistance is a passive element

D.ย  conductance is a passive element

Solution:

535.ย  A resistance R is connected across two batteries, A and B connected in parallel. The open circuit emfs and internal resistances of the batteries are 12 V, 2 ohmsย  andย  8ย  V,ย  1ย  ohmย  respectively.ย  Determineย  the ohmicย  valueย  ofย  Rย  ifย  theย  powerย  absorbedย  byย  Rย  is 7.656 watts.

A.ย  10 ฮฉ

B.ย  12 ฮฉ

C.ย  9 ฮฉ

D.ย  8 ฮฉ

Solution:

536.ย  Aย  networkย  hasย  7ย  nodesย  andย  5ย  independentย  loops. The number of branches in the network is

A.ย  13

B.ย  12

C.ย  11

D.ย  10

Solution:

537.ย  The nodal method of circuit analysis is based on

A.ย  Kirchhoffโs Voltage Law & Ohmโs law

B.ย  Kirchhoffโs Current Law & Ohmโs law

C.ย  Kirchhoffโsย  Currentย  Lawย  &ย  Kirchhoffโsย  Voltage Law

D.ย  Kirchhoffโsย  Currentย  Lawย  &ย  Kirchhoffโsย  Voltage Law & Ohmโs law

Solution:

538.ย  Forย  aย  networkย  ofย  sevenย  branchesย  andย  fourย  nodes, the number of independent loops will be

A.ย  11

B.ย  8

C.ย  7

D.ย  4

Solution:

539.ย  Aย  networkย  hasย  bย  branchesย  andย  nodes.ย  Forย  this mesh analysis will be simpler then node analysis if n is greater then

A.ย  b

B.ย  b + 1

C.ย  (b/2) + 1

D.ย  b/2

Solution:

540.ย  The number of independent loops for a network with n nodes and b branches is

A.ย  n – 1

B.ย  b – n

C.ย  b – n + 1

D.ย  independent no. of nodes

Solution:

541.ย  The following constitutes a bilateral element

A.ย  Resistor

B.ย  FET

C.ย  Vacuum Tube

D.ย  metal rectifier

Solution:

542.ย  Kirchhoffโs Laws fail in the case of

A.ย  linear networks

B.ย  non-linear networks

C.ย  dual networks

D.ย  distributed parameter networks

Solution:

543.ย  Ohmโsย  law,ย  Kirchhoffโsย  Currentย  Lawย  &ย  Kirchhoffโs Voltage will fail at

A.ย  Low frequency

B.ย  high frequency

C.ย  high power

D.ย  none of these

Solution:

544.ย  Total no, of mesh equations required is equal to

B.ย  number of tree branches

C.ย  number of nodes

D.ย  none of these

Solution:

545.ย  Theย  minimumย  numberย  ofย  equationsย  requiredย  to analyze the circuit

A.ย  3

B.ย  4

C.ย  6

D.ย  7

Solution:

546.ย  Equivalent impedance seen across terminals a, b is

A.ย  16/3 โฆ

B.ย  8/3 โฆ

C.ย  8/3 + j12

D.ย  none of these

Solution:

547.ย  Whatย  isย  theย  Rabย  inย  theย  circuitย  whenย  allย  resistors values are R?

A.ย  2R

B.ย  R

C.ย  R/2

D.ย  3R

Solution:

548.ย  Find Rab. All values are in ohms.

A.ย  22.5

B.ย  40

C.ย  30

D.ย  none of these

Solution:

549.ย  Findย  theย  equivalentย  resistanceย  ofย  theย  circuitย  inย  the figure.

A.ย  3 ohms

B.ย  4 ohms

C.ย  5 ohms

D.ย  6 ohms

Solution:

550.ย  Findย  theย  equivalentย  resistanceย  ofย  theย  circuitย  inย  this figure.

A.ย  R

B.ย  2R

C.ย  3R

D.ย  4R

Solution:

Questions and Answers in DC Circuits

Following is the list of practice exam test questions in this brand new series:

MCQ in DC Circuits
PART 1: MCQ from Number 1 โ 50                Answer key: included
PART 2: MCQ from Number 51 โ 100            Answer key: included
PART 3: MCQ from Number 101 โ 150           Answer key: included
PART 4: MCQ from Number 151 โ 200           Answer key: included
PART 5: MCQ from Number 201 โ 250           Answer key: included
PART 6: MCQ from Number 251 โ 300           Answer key: included
PART 7: MCQ from Number 301 โ 350           Answer key: included
PART 8: MCQ from Number 351 โ 400            Answer key: included
PART 9: MCQ from Number 401 โ 450            Answer key: included
PART 10: MCQ from Number 451 โ 500          Answer key: included

P inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. Also provides professionals with materials for their lectures and practice exams. Help me go forward with the same spirit.

โWill you subscribe today via YOUTUBE?โ

Subscribe

• Full Content Access Exclusive to Premium members

• CIVIL ENGINEERING REVIEWER
• CIVIL SERVICE EXAM REVIEWER
• CRIMINOLOGY REVIEWER
• ELECTRONICS ENGINEERING REVIEWER (ECE/ECT)
• ELECTRICAL ENGINEERING & RME REVIEWER
• FIRE OFFICER EXAMINATION REVIEWER
• LET REVIEWER
• MASTER PLUMBER REVIEWER
• MECHANICAL ENGINEERING REVIEWER
• NAPOLCOM REVIEWER

FOR A LIMITED TIME

If you subscribe for PREMIUM today!