This is the Multiple Choice Questions Part 10 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 10 of the Series

NETWORK THEOREMS

**Choose the letter of the best answer in each questions.**

โ MCQ in DC Circuits Part 9 | REE Board Exam

451.ย The value of R_{th} in Fig. 3.4(b) is ____.

A.ย 15 ฮฉ

B.ย 3.5 ฮฉ

C.ย 6.4 ฮฉ

D.ย 7.4 ฮฉ

Answer: **Option D**

Solution:

452.ย Theย open-circuitedย voltageย atย terminalsย ABย inย Fig. 3.4(a) is

A.ย 12 V

B.ย 20 V

C.ย 24 V

D.ย 40 V

Answer: **Option C**

Solution:

453.ย For transfer of maximum power in the circuit shown in Fig. 3.4(a), the value of R_{L} should be ____.

A.ย 3.5 ฮฉ

B.ย 6.4 ฮฉ

C.ย 7.4 ฮฉ

D.ย 15 ฮฉ

Answer: **Option C**

Solution:

454.ย Fig. 3.5(b) shows Nortonโs equivalent circuit of Fig. 3.5(a). The value of R_{N} is ____.

A.ย 5 ฮฉ

B.ย 4.5 ฮฉ

C.ย 10.5 ฮฉ

D.ย none of these

Answer: **Option B**

Solution:

455.ย The value of I_{N} in Fig. 3.5(b) is ____.

A.ย 3 A

B.ย 1 A

C.ย 2 A

D.ย none of these

Answer: **Option C**

Solution:

456.ย Theveninโsย theoremย isย ____ย formย on an equivalent circuit.

A.ย voltage

B.ย current

C.ย both voltage and current

D.ย none of these

Answer: **Option A**

Solution:

457.ย Nortonโs theorem is ____ Theveninโs theorem.

Aย ย the same as.

B.ย converse of

C.ย equal to

D.ย none of these

Answer: **Option B**

Solution:

458.ย Inย theย analysisย ofย aย vacuumย tubeย circuit,ย we generally use ____.

A.ย superposition

B.ย Nortonโs

C.ย Theveninโs

D.ย reciprocity

Answer: **Option C**

Solution:

459.ย Nortonโsย theoremย isย ____ย formย ofย anย equivalent circuit

A.ย voltage

B.ย current

C.ย both voltage and current

D.ย none of these

Answer: **Option B**

Solution:

460.ย Inย theย analysisย ofย aย transistorย circuit,ย weย generally use ____.

A.ย Nortonโs

B.ย Theveninโs

C.ย reciprocity

D.ย superposition

Answer: **Option A**

Solution:

461.ย Fig.ย 3.6(a)ย showsย Nortonโsย equivalentย circuitย ofย a networkย whereasย Fig.ย 3.6(b)ย showsย itsย Theveninโs equivalent circuit. The value of V_{th} is ____.

A.ย 1.5 V

B.ย 0.866 V

C.ย 3 V

D.ย 6 V

Answer: **Option D**

Solution:

462.ย The value of R_{th} in Fig. 3.6(b) is ____.

A.ย 3 ฮฉ

B.ย 2 ฮฉ

C.ย 1.5 ฮฉ

D.ย 6 ฮฉ

Answer: **Option A**

Solution:

463.ย If in Fig. 3.6(a), the value of I_{N}ย is 3 A, then value of V_{th} in Fig. 3.6(b) will be ____.

A.ย 1 V

B.ย 9 V

C.ย 5 V

D.ย none of these

Answer: **Option B**

Solution:

464.ย For maximum power transfer, the relation between load resistance R_{Lย } and internal resistance R_{i}ย of the voltage source is ____.

A.ย R_{L} = 2R_{i}

B.ย R_{L} = 0.5R_{iย }

C.ย R_{L} = 1.5R_{i}

D.ย R_{L} = R_{i}

Answer: **Option D**

Solution:

465.ย Underย theย conditionsย ofย maximumย powerย transfer, the efficiency is ____.

A.ย 75%

B.ย 100%

C.ย 50%

D.ย 25%

Answer: **Option C**

Solution:

466.ย The open-circuited voltage at terminals of load R_{L} is 30ย Vย Underย theย conditionsย ofย maximumย power transfer, the load voltage would be ____.

A.ย 30 V

B.ย 10 V

C.ย 5 V

D.ย 15 V

Answer: **Option D**

Solution:

467.ย Theย maximumย powerย transferย theoremย isย usedย in ____.

A.ย electronic circuits

B.ย power system

C.ย home lighting circuits

D.ย none of these

Answer: **Option A**

Solution:

468.ย Under the conditions of maximum power transfer, a voltage source is delivering a power of 30 W to the load. The power generated by the source is ____.

A.ย 45 W

B.ย 30 W

C.ย 60 W

D.ย 90 W

Answer: **Option C**

Solution:

469.ย Forย theย circuitย shownย inย Fig.ย 3.7,ย theย power transferredย willย beย maximumย whenย R_{L}ย isย equalย to _____.

A.ย 4.5 ฮฉ

B.ย 6 ฮฉ

C.ย 3 ฮฉ

D.ย none of these

Answer: **Option B**

Solution:

470.ย Theย open-circuitedย voltageย atย terminalsย ABย inย Fig. 3.7 is ____.

A.ย 12 V

B.ย 6 V

C.ย 15 V

D.ย 9.5 V

Answer: **Option A**

Solution:

471.ย Ifย inย Fig.ย 3.7,ย theย valueย ofย R_{L}ย =ย 6ย ฮฉ,ย thenย current through R_{L} is ____.

A.ย 2 A

B.ย 1.5 A

C.ย 1.75 A

D.ย 1 A

Answer: **Option D**

Solution:

472.ย Underย theย conditionsย ofย maximumย powerย transfer, the voltage across R_{L} in Fig. 3.7 is ____.

A.ย 6 V

B.ย 4 V

C.ย 9 V

D.ย 12 V

Answer: **Option A**

Solution:

473.ย The output resistance of a voltage source is 4 ฮฉ. Its internal resistance will be ____.

A.ย 4 ฮฉ

B.ย 2 ฮฉ

C.ย 1 ฮฉ

D.ย infinite

Answer: **Option A**

Solution:

474.ย Delta/starย ofย star/deltaย transformationย techniqueย is applied to _____.

A.ย one terminal

B.ย two terminal

C.ย three terminal

D.ย none of these

Answer: **Option C**

Solution:

475.ย Kirchhoffโs current law is applicable to only

A.ย ย closed loops in a network

B.ย electronic circuits

C.ย conjunctions in a network

D.ย electric circuits

Answer: **Option C**

Solution:

476.ย Kirchhoffโs voltage law is concerned with

A.ย IR drops

B.ย battery e.m.f.s.

C.ย junction voltages

D.ย both A and B

Answer: **Option D**

Solution:

477.ย According to KVL, the algebraic sum of all IR drops andย e.m.f.sย inย anyย closedย loopย ofย aย networkย is always

A.ย zero

B.ย positive

C.ย negative

D.ย determined by the battery e.m.f.s

Answer: **Option A**

Solution:

478.ย Theย algebraicย signย ofย anย IRย dropย isย primarily dependent upon the

A.ย amount of current flowing through it

B.ย value of R

C.ย direction of current flow

D.ย battery connection

Answer: **Option C**

Solution:

479.ย Maxwellโsย loop currentย methodย of solvingย electrical networks

A.ย uses branch currents

B.ย utilizes Kirchhoffโs voltage law

C.ย is confined to single-loop circuits

D.ย is a network reduction method

Answer: **Option B**

Solution:

480.ย Pointย outย theย WRONGย statement.ย Inย theย node-voltageย techniqueย ofย solvingย networks,ย choiceย ofย a reference node does not

A.ย affect the operation of the circuit

B.ย change the voltage across any element

C.ย alter the p.d. between any pair of nodes

D.ย affect the voltages of various nodes

Answer: **Option D**

Solution:

481.ย Theย nodalย analysisย isย primarilyย basedย onย the application of

A.ย KVL

B.ย KCL

C.ย Ohmโs Law

D.ย both B and C

Answer: **Option D**

Solution:

482.ย Superpositionย theoremย isย canย beย appliedย onlyย to circuits having ____ elements.

A.ย non-linear

B.ย passive

C.ย linear bilateral

D.ย resistive

Answer: **Option C**

Solution:

483.ย The Superposition theorem is essentially based on the concept of

A.ย duality

B.ย linearity

C.ย reciprocity

D.ย non-linearity

Answer: **Option C**

Solution:

484.ย While Thevenizing a circuit between two terminals, V_{th} equals

A.ย short-circuit terminal voltage

B.ย open circuit terminal voltage

C.ย EMF of the battery nearest to the terminal

D.ย net voltage available in the circuit

Answer: **Option B**

Solution:

485.ย Thevenin resistance R_{th} is found

A.ย between any two โopenโ terminals

B.ย by short-circuiting the given two terminals

C.ย ย byย removingย voltageย sourcesย alongย withย their internal resistance

D.ย between same open terminals as for V_{th}

Answer: **Option D**

Solution:

486.ย Whileย calculatingย R_{th},ย constant-currentย sourcesย in the circuit are

A.ย replaced by โopensโ

B.ย replaced by โshortsโ

C.ย treated in parallel with other voltage sources

D.ย converted into equivalent voltage sources

Answer: **Option A**

Solution:

487.ย Thevenin resistance of the circuit ofย Fig. 2.1 across its terminals A and B is ____ ohm.

A.ย 6

B.ย 3

C.ย 9

D.ย 2

Answer: **Option A**

Solution:

488.ย Theย loadย resistanceย neededย toย extractย maximum power from the circuit of Fig. 2.2 is ____ ohm.

A.ย 2

B.ย 9

C.ย 6

D.ย 18

Answer: **Option C**

Solution:

489.ย The Norton equivalent circuit for the network of Fig. 2.2ย betweenย Aย andย Bย isย ____ย currentย sourceย with parallel resistance of ____.

A.ย 2 A, 6 ฮฉ

B.ย 3 A, 2 ฮฉ

C.ย 2 A, 3 ฮฉ

D.ย 3 A, 9 ฮฉ

Answer: **Option B**

Solution:

490.ย The Norton equivalent of a circuit consists of a 2 A currentย sourceย inย parallelย withย aย 4 ฮฉย resistor. Theveninย equivalentย ofย thisย circuitย isย aย ____ย volt source in series with a 4 ฮฉ resistor.

A.ย 2

B.ย 0.5

C.ย 6

D.ย 8

Answer: **Option D**

Solution:

491.ย Ifย twoย identicalย 3ย A,ย 4ย ฮฉ Nortonย equivalentย circuits areย connectedย inย parallelย withย likeย polarityย toย like, the combined Norton equivalent circuit is

A.ย 6 A, 4 ฮฉ

B.ย 6 A, 2 ฮฉ

C.ย 3 A, 2 ฮฉ

D.ย 6 A, 8 ฮฉ

Answer: **Option D**

Solution:

492.ย Twoย 6ย V,ย 2ย ฮฉ batteriesย areย connectedย inย series aiding.ย Thisย combinationย canย beย replacedย byย a singleย equivalentย currentย generatorย ofย ____ย withย a parallel resistance of ____ ohm.

A.ย 3 A, 4 ฮฉ

B.ย 3 A, 2 ฮฉ

C.ย 3 A, 1 ฮฉ

D.ย 5 A, 2 ฮฉ

Answer: **Option B**

Solution:

493.ย Twoย identicalย 3ย A,ย 1ย ฮฉ batteriesย areย connectedย in parallelย withย likeย polarityย withย likeย polarityย toย like. The Norton equivalent circuit of the combination is

A.ย 3 A, 0.5 ฮฉ

B.ย 6 A, 1 ฮฉ

C.ย 3 A, 1 ฮฉ

D.ย 6 A, 0.5 ฮฉ

Answer: **Option D**

Solution:

494.ย Thevenin equivalent circuit of the network shown in Fig.ย 2.3ย isย required.ย Theย valueย ofย theย open-circuit voltageย acrossย terminalsย aย andย bย ofย thisย circuitย is ____ volt.

A.ย zero

B.ย 2i/10

C.ย 2i/5

D. 2i/15

Answer: **Option A**

Solution:

495.ย Forย aย linearย networkย containingย generatorsย and impedance,ย theย ratioย ofย theย voltageย toย theย current producedย inย otherย loopย isย theย sameย asย theย ratioย of voltage andย current obtained when the positions of the voltage source and the ammeter measuring the currentย areย interchanged.ย Thisย networkย theoremย is known as ____ theorem.

A.ย Millmanโs

B.ย Nortonโs

C.ย Tellegenโs

D.ย Reciprocity

Answer: **Option D**

Solution:

496.ย Aย 12ย voltย sourceย withย anย internalย resistanceย ofย 1.2 ohmsย isย connectedย acrossย aย wire-woundย resistor. Maximumย powerย willย beย dissipatedย inย theย resistor when its resistance is equal to

A.ย zero

B.ย 1.2 ohm

C.ย 12 ohms

D.ย infinity

Answer: **Option B**

Solution:

497.ย Three 3.33 ฮฉย resistors are connected in wye. What is the value of the equivalent resistors connected in delta?

A.ย 3.33 ฮฉ

B.ย 10 ฮฉ

C.ย 6.67 ฮฉ

D.ย 20 ฮฉ

Answer: **Option B**

Solution:

498.ย Find the equivalent resistance between terminals a &ย bย ofย theย circuitย shown.ย ย Eachย resistanceย hasย a value of 1 ohm.

A.ย 5/6 ohms

B.ย 5/11 ohms

C.ย 5/14 ohms

D.ย 5/21 ohms

Answer: **Option B**

Solution:

499.ย What do you call the head to tail connection of two or more op-amp circuits wherein the output of one op-amp is the input of another op-amp?

A.ย Parallel Op-Amps

B.ย Follow-Thru Connection

C.ย Cascade Connection

D.ย Series Op-Amps

Answer: **Option C**

Solution:

500.ย Find the power dissipation in the 6 ohms resistor in the next figure.

A.ย 54 W

B.ย 216 W

C.ย 121.5 W

D.ย 150 W

Answer: **Option B**

Solution:

โ MCQ in DC Circuits Part 11 | REE Board Exam

#### Questions and Answers in DC Circuits

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

**MCQ in DC Circuits**

**MCQ from Number 1 โ 50**Answer key:

**included**

**MCQ from Number 51 โ 100**Answer key:

**included**

**MCQ from Number 101 โ 150**Answer key:

**included**

**MCQ from Number 151 โ 200**Answer key:

**included**

**MCQ from Number 201 โ 250**Answer key:

**included**

**MCQ from Number 251 โ 300**Answer key:

**included**

**MCQ from Number 301 โ 350**Answer key:

**included**

**MCQ from Number 351 โ 400**Answer key:

**included**

**MCQ from Number 401 โ 450**Answer key:

**included**

**MCQ from Number 451 โ 500**Answer key:

**included**

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