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# MCQ in DC Circuits Part 12 | REE Board Exam

This is the Multiple Choice Questions Part 12 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 12 of the Series

NETWORK THEOREMS

Choose the letter of the best answer in each questions.

551.ย  Find the total resistance Rin is in the circuit shown.

A.ย  1 + โ3

B.ย ย  (1 – โ5)/3

C.ย ย  (-1 + โ5)/2

D.ย  none of these

Solution:

552.ย  What is the value of i1?

A.ย  0

B.ย  โ6

C.ย  6

D.ย  none of these

Solution:

553.ย  Find Ix in the circuit shown.

A.ย  3A

B.ย  โ3 A

C.ย  0

D.ย  none of these

Solution:

554.ย  Find value of R in the given circuit.

A.ย  8.2 โฆ

B.ย  6 โฆ

C.ย  10 โฆ

D.ย  none of these

Solution:

555.ย  The voltage V in the figureย  always equal to

A.ย  9 V

B.ย  5 V

C.ย  1 V

D.ย  none of these

Solution:

556.ย  Find V in the circuit shown.

A.ย  2 V

B.ย  3 V

C.ย  1 V

D.ย  none of these

Solution:

557.ย  Find V in the circuit shown.

A.ย  โ 3 V

B.ย  +3 V

C.ย  2 V

D.ย  none of these

Solution:

558.ย  Find V in the circuit shown.

A.ย  + 3 V

B.ย  โ 3 V

C.ย  2 V

D.ย  none of these

Solution:

559.ย  Determine VX of this circuit

A.ย  42.2 V

B.ย  83.3 V

C.ย  97.3ย ย  V

D.ย  103ย  V

Solution:

560.ย  Find voltage eo in the fig shown.

A.ย  2 V

B.ย  4/3 V

C.ย  4 V

D.ย  8 V

Solution:

561.ย  Find VX in the circuit shown

A.ย  2.5 V

B.ย  -2.5 V

C.ย  0 V

D.ย  10 V

Solution:

562.ย  Find voltage eo in the fig shown

A.ย  48 V

B.ย  24 V

C.ย  36 V

D.ย  28 V

Solution:

563.ย  The voltage v(t) is

A.ย  eat โ e-bt

B.ย  eat + ebt

C.ย  aeat โ bebt

D.ย  aeat + bebt

Solution:

564.ย  Find current through 5 โฆ resistor

A.ย  0

B.ย  2 A

C.ย  3 A

D.ย  7 A

Solution:

565.ย  Find Vxy

A.ย  10 V

B.ย  46 V

C.ย  13 V

D.ย  58 V

Solution:

566.ย  What is VAB?

A.ย  3V

B.ย  54V

C.ย  24 V

D.ย  none of these

Solution:

567.ย  What is Vxy?

A.ย  20 V

B.ย  30 V

C.ย  โ10 V

D.ย  10 V

Solution:

568.ย  Inย  theย  circuitย  ofย  theย  givenย  figure.ย  Theย  valueย  ofย  the voltage source E is

A.ย  โ16 V

B.ย  4 V

C.ย  โ6 V

D.ย  16 V

Solution:

569.ย  Find i2 in the figure shown.

A.ย  4 A

B.ย  2/3 A

C.ย  -2/3 A

D.ย  none of these

Solution:

570.ย  When a resistor R is connected to a current source, it consumes a power of 18 W. When the same R is connectedย  toย  aย  voltageย  sourceย  havingย  same magnitudeย  asย  theย  currentย  source,ย  theย  power absorbedย  byย  Rย  isย  4.5ย  W.ย  Theย  magnitudeย  ofย  the current source & value of R are

A.ย  โ18ย A & 1 ohm

B.ย  3 A & 2 ohms

C.ย  1 A & 18 ohms

D.ย  6 A & 0.5 ohms

Solution:

571.ย  In the circuit shown in the figure. If I = 2, then the value of the battery voltage V will be

A.ย  5 V

B.ย  3 V

C.ย  2 V

D.ย  1 V

Solution:

572.ย  Find E and I in the figure shown.

A.ย  I = 13 A and E = 31 V

B.ย  I = 31 A and E = 13V

C.ย  E = 31 V and I = 31A

D.ย  none of these

Solution:

573.ย  Find the voltage across the terminals a and b.

A.ย  0.5 V

B.ย  3.0 V

C.ย  3.5 V

D.ย  4.0 V

Solution:

574.ย  Whatย  isย  theย  currentย  suppliedย  byย  1ย  Vย  sourceย  when each resistance is 1 ohm?

A.ย  8/15 A

B.ย  15/4 A

C.ย  4/15ย ย  A

D.ย  none of these

Solution:

575.ย  The voltage V is equal to

A.ย  3 V

B.ย  โ3 V

C.ย  5 V

D.ย  none of these

Solution:

576.ย  The voltage across 15 ohms resistor is

A.ย  -105 V

B.ย  +105 V

C.ย  โ15 V

D.ย  + 15 V

Solution:

577.ย  In the circuit of the given figure. The current I will be

A.ย  1 A

B.ย  2 A

C.ย  4 A

D.ย  8 A

Solution:

578.ย  In the circuit shown inย  the givenย  figure, the potential difference V2 โ V1 is

A.ย  โ4.5 V

B.ย  0

C.ย  4.5 V

D.ย  6 V

Solution:

579.ย  Find V in the figure shown.

A.ย  56.25 V

B.ย  85 V

C.ย  40 V

D.ย  none of these

Solution:

580.ย  What is VA?

A.ย  -2 V

B.ย  2 V

C.ย ย  -4 V

D.ย  4 V

Solution:

581.ย  What is the value of I4 in the fig shown?

A.ย  โ4 A

B.ย  โ2 A

C.ย  known only if V1, V2 and R are known

D.ย  known only if V1, V2 are known

Solution:

582.ย  If the voltage of each source in the given network is doubled,ย  thenย  whichย  ofย  theย  followingย  statement would be true?

1.ย  Current flowing in the network will be doubled

2.ย  Voltages across each resistor will be doubled

3.ย  Powerย  absorbedย  byย  eachย  resistorย  willย  be doubled

4.ย  Powerย  deliveredย  byย  eachย  sourceย  willย  be doubled

A.ย  1, 2, 3, 4

B.ย  1, 2

C.ย  2, 3

D.ย  1, 3, 4

Solution:

583.ย  Forย  aย  givenย  network,ย  theย  numberย  ofย  independent meshย  equationย  (Nm)ย  andย  theย  numberย  of independent node equation (Nn) obey the following:

A.ย  Nm = Nn

B.ย  Nm > Nn

C.ย  Nm < Nn

D.ย  anyย  oneย  ofย  theย  above,ย  dependingย  onย  the network

Solution:

584.ย  In the circuit ofย  the givenย  figure. What is the current I?

A.ย  1 A

B.ย  4/3 A

C.ย  2 A

D.ย  3 A

Solution:

585.ย  Find the value of R for which the power supplied by the voltage source is zero.

A.ย  0

B.ย  1.5 ohms

C.ย  6 ohms

D.ย  0.667 ohms

Solution:

586.ย  Whatย  valueย  ofย  Rย  whichย  ensuresย  thatย  theย  current through the 60 ohm resistor of this circuit is 1 A?

A.ย  5 ohms

B.ย  10 ohms

C.ย  15 ohms

D.ย  20 ohms

Solution:

587.ย  The current I in the circuit of the figure is

A.ย  2 A

B.ย  1.5 A

C.ย  0.5 A

D.ย  0 A

Solution:

588.ย  In the circuit shown in the given figure, current I is

A.ย  โ2/5

B.ย  24/5

C.ย  18/5

D.ย  2/5

Solution:

589.ย  Aย  35ย  Vย  sourceย  isย  connectedย  toย  aย  seriesย  circuitย  of 600โฆย  andย  Rย  asย  shown.ย  Ifย  aย  voltmeterย  ofย  internal resistance1.2ย  kโฆย  isย  connectedย  acrossย  600ย  โฆ resistor it reads 5 V, find the value of R.

A.ย  1.2 kฮฉ

B.ย  2.4 kโฆ

C.ย  3.6 kโฆ

D.ย  7.2 kโฆ

Solution:

590.ย  Find the current in RL in the circuit below.

A.ย  0

B.ย  2/3

C.ย  1/3

D.ย  none

Solution:

591.ย  Theย  currentย  flowingย  throughย  theย  voltageย  sourceย  in the given circuit is

A.ย  1.0 A

B.ย  0.75 A

C.ย  0.5 A

D.ย  0.25 A

Solution:

592.ย  In the circuit shown, the voltage across 2 โฆ resistor isย  20ย  V.ย  Theย  5ย  โฆย  resistorย  connectedย  betweenย  the terminals A and B can be replaced by an ideal

A.ย  Voltageย  sourceย  ofย  25 Vย  withย  +veย  terminal upward

B.ย  Voltageย  sourceย  ofย  25 Vย  withย  +veย  terminal downward

C.ย  Current source of 2 A upward

D.ย  Current source of 2 A downward

Solution:

593.ย  Inย  theย  circuitย  shownย  inย  theย  figure.ย  Theย  effective resistance faced by the voltage source is

A.ย  1 โฆ

B.ย  2 โฆ

C.ย  3 โฆ

D.ย  3.3 โฆ

Solution:

594.ย  Ifย  aย  resistanceย  โRโย  ofย  1โฆย  isย  connectedย  acrossย  the terminalsย  ABย  asย  shownย  inย  theย  givenย  fig.ย  Thenย  the current flowing through R will be

A.ย  1 A

B.ย  0.5 A

C.ย  0.25 A

D.ย  0.125 A

Solution:

595.ย  Find VL across the ยผ ohm resistor of this circuit.

A.ย  1/52 V

B.ย  2/52 V

C.ย  3/52 V

D.ย  5/52ย V

Solution:

596.ย  Find Ix in the fig shown

A.ย  1 A

B.ย  โ2 A

C.ย  2 A

D.ย  none of these

Solution:

597.ย  Aย  particularย  resistorย  Rย  dissipatesย  aย  powerย  ofย  4 W whenย  Vย  aloneย  isย  active.ย  Theย  sameย  resistorย  R dissipates a power of 9 watts when I alone is active. The power dissipated by R when both sources are active will be

A.ย  1 W

B.ย  5 W

C.ย  13 W

D.ย  25 W

Solution:

598.ย  The linear network contains only resistors if is1 = 8 A, is2 = 12 A, Vx is found to be 80 v. If is1 = -8 A, is2 = 4 A, Vx = 0 . Find Vx when is1 = is2 = 20 A.

A.ย  โ150

B.ย  150

C.ย  100

D.ย  50

Solution:

599.ย  When Rย  =ย  10ย  ohms,ย  VRย  =ย  20ย  V, when Rย  =ย  20 ohms VR = 30 V. Find VR when R = 80 ohms.

A.ย  40

B.ย  160

C.ย  48

D.ย  none

Solution:

600.ย  Find V1 & V2.

A.ย  4 V, 8 V

B.ย  8 V, 4 V

C.ย  6 V, 6 V

D.ย  12 V, 12 V

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

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