1. To find current in a resistance connected in a network, Thevenin’s theorem is used V_{th} = 20V and R_{th} = 5 Ω. The current through the resistance is

- 4 A
- is 4 A or less
- is less than 4 A
- May be 4 A or less or more than 4 A

2. The application of Thevenin’s theorem in a circuit results in

- an ideal voltage source
- an ideal current source
- a current source and an impedance in parallel
- a voltage source and an impedance in series

3. Thevenin’s theorem converts a circuit to an equivalent form consisting of

- a current source and a series resistance
- a voltage source and a parallel resistance
- a voltage source and a series resistance
- a current source and a parallel resistance

4. While calculating R_{th} in Thevenin’s theorem and Norton equivalent

- all independent sources are made dead
- only current sources are made dead
- only voltage sources are made dead
- all voltage and current sources are made dead

5. How can Thevenin’s impedance and Norton impedance be correlated in an AC circuit

- always the same
- generally the same
- sometimes the same
- always different

6. Thevenin’s theorem cannot be applied to

- linear circuit
- non-linear circuit
- active circuit
- passive circuit

7. While thevenizing a circuit between two terminals, V_{th} is equal to

- short circuit terminal voltage
- open circuit terminal voltage
- net voltage available in the circuit
- e.m.f. of the battery nearest to the terminals

8. In the analysis of a vacuum tube circuit, we generally use __________ theorem.

- superposition
- norton’s
- thevenin’s
- reciprocity

9. Thevenin’s theorem is _______ form of an equivalent circuit.

- voltage
- current
- both voltage and current
- none of these

10. Thevenin’s model the resistance R_{th} is defined as

- open circuit impedance between two points
- close circuit impedance between two points
- impedance calculated by replacing voltage/current source with their impedance
- none of these

11. The above result was obtained from measurements taken between the two terminals of a resistive network. The Thevenin resistance of the network is

Terminal voltage | 12 V | 0 V |

Terminal current | 0 A | 1.5 A |

- 16 Ω
- 8 Ω
- 0
- ∞

12. While calculating thevening resistance (R_{th}), constant-current sources in the circuit are

- replaced by ‘opens’
- replaced by ‘shorts’
- treated in parallel with other voltage sources
- converted into equivalent sources

13. While thevenizing a circuit between two terminals, V_{th} equals

- short circuit terminal voltage
- open circuit terminal voltage
- emf of the battery nearest to the terminals
- net voltage available in the circuit

14. Thevenin’s theorem reduces a two-terminal network to a

- one terminal network
- current generator in parallel with an impedance
- voltage generator in series with an impedance
- combination of current and voltage generator

15. Thevenin’s theorem is ___________ form of an equivalent circuit.

- voltage
- current
- both voltage and current
- none of these

16. As per Thevenin’s theorem: If the internal impedance is not known, independent voltage and current sources will

- be replaced by open short circuit respectively
- be replaced by short and open circuit respectively
- will both be replaced by open circuit
- will both be replaced by short circuit

17. Thevenin’s theorem cannot be applied to networks that contain elements which are

- active
- passive
- linear
- non-linear

18. In Thevenin’s theorem, to find Z

- all independent voltage sources are short-circuited and all independent current sources are open-circuited.
- all independent voltage sources are open-circuited and all independent current sources are short-circuited.
- all independent voltage sources are short-circuited and all independent current sources are short-circuited.
- all independent voltage sources are open-circuited and all independent current sources are open-circuited.

19. For a network, Thevenin equivalent is given by V_{th} = 10V and R_{th} = 50 Ω. If this network is shunted by another 50 Ω at load. What is the new Thevenin equivalent of the network?

- 5 V, 50 Ω
- 5 V, 25 Ω
- 10 V, 50 Ω
- 10 V, 25 Ω