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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Basic Electrical Technology  >  Test: Thevenin’s Theorem - Electrical Engineering (EE) MCQ

Test: Thevenin’s Theorem - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test Basic Electrical Technology - Test: Thevenin’s Theorem

Test: Thevenin’s Theorem for Electrical Engineering (EE) 2024 is part of Basic Electrical Technology preparation. The Test: Thevenin’s Theorem questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Thevenin’s Theorem MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Thevenin’s Theorem below.
Solutions of Test: Thevenin’s Theorem questions in English are available as part of our Basic Electrical Technology for Electrical Engineering (EE) & Test: Thevenin’s Theorem solutions in Hindi for Basic Electrical Technology course. Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free. Attempt Test: Thevenin’s Theorem | 10 questions in 10 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study Basic Electrical Technology for Electrical Engineering (EE) Exam | Download free PDF with solutions
Test: Thevenin’s Theorem - Question 1
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Calculate the Thevenin resistance across the terminal AB for the following circuit.​

Detailed Solution for Test: Thevenin’s Theorem - Question 1

Thevenin resistance is found by opening the circuit between the specified terminal and shorting all voltage sources.
When the 10V source is shorted, we get:
Rth=(1||2)+3=3.67 ohm.

Test: Thevenin’s Theorem - Question 2
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Calculate Vth for the given circuit.​

Detailed Solution for Test: Thevenin’s Theorem - Question 2

Thevenin resistance is found by opening the circuit between the specified terminal and shorting all voltage sources.
When the 10V source is shorted, we get:
Rth=(1||2)+3=3.67 ohm.
Vth is calculated by opening the specified terminal.
Using voltage divider, Vth= 2*10/(2+1)=6.67V.

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Test: Thevenin’s Theorem - Question 3
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Calculate the current across the 4 ohm resistor.​

Detailed Solution for Test: Thevenin’s Theorem - Question 3

Thevenin resistance is found by opening the circuit between the specified terminal and shorting all voltage sources.
When the 10V source is shorted, we get:
Rth=(1||2)+3=3.67 ohm.
Vth is calculated by opening the specified terminal.
Using voltage divider, Vth= 2*10/(2+1)=6.67V.
On drawing the Thevenin equivalent circuit, we get Rth, 4 ohm and Vth in series.
Applying ohm’s law, I=Vth/(4+Rth)= 0.86A.

Test: Thevenin’s Theorem - Question 4
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The Thevenin voltage is the__________
Detailed Solution for Test: Thevenin’s Theorem - Question 4

Thevenin voltage is the open circuit voltage. It is the voltage across the specified terminals. It is not the short circuit voltage because short circuit voltage is equal to zero.

Test: Thevenin’s Theorem - Question 5
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 Thevenin resistance is found by ________
Detailed Solution for Test: Thevenin’s Theorem - Question 5

 Current sources have infinite internal resistance hence behave like an open circuit whereas ideal voltage sources have 0 internal resistance hence behave as a short circuit.

Test: Thevenin’s Theorem - Question 6
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Thevenin’s theorem is true for __________
Detailed Solution for Test: Thevenin’s Theorem - Question 6

 Thevenin’s theorem works for only linear circuit elements and not non-linear ones such as BJT, semiconductors etc.

Test: Thevenin’s Theorem - Question 7
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In Thevenin’s theorem Vth is__________
Detailed Solution for Test: Thevenin’s Theorem - Question 7

Thevenin’s theorem states that a combination of voltage sources, current sources and resistors is equivalent to a single voltage source V and a single series resistor R.

Test: Thevenin’s Theorem - Question 8
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Vth is found across the ____________ terminals of the network.
Detailed Solution for Test: Thevenin’s Theorem - Question 8

 According to Thevenin’s theorem, Vth is found across the output terminals of a network and not the input terminals.

Test: Thevenin’s Theorem - Question 9
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Can we use Thevinin’s theorem on a circuit containing a BJT?
Detailed Solution for Test: Thevenin’s Theorem - Question 9

We can use Thevenin’s theorem only for linear networks. BJT is a non-linear network hence we cannot apply Thevenin’s theorem for it.

Test: Thevenin’s Theorem - Question 10
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A Thevenin equivalent source comprises of which of the following elements?
Detailed Solution for Test: Thevenin’s Theorem - Question 10

Thevenin Equivalent Source:

Thevenin's theorem states that any linear electrical network with voltage and current sources and resistances can be replaced at a pair of terminals by an equivalent voltage source (Vth) in series with an equivalent resistance (Rth).


This means the Thevenin equivalent source is characterized by:

  • A single voltage source (Vth)
  • A single series resistance (Rth)

Therefore, the correct description of a Thevenin equivalent source is: A single voltage source in series with a resistance

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