1. . Kirchhoff’s first law is also called:
(A) Mesh
(B) Point
(C) Voltage
(D) Faraday’s
2. . Kirchhoff’s second law is also called:
(A) Mesh
(B) Point
(C) Voltage
(D) Faraday’s
3. . Kirchhoff’s current law applies only:
(A) Close loop in a network
(B) Electric
(C) Electronic
(D) Junction in a network
4. . Kirchhoff’s voltage law applies only:
(A) Close loop
(B) Electric
(C) Electronic
(D) Junction
5. . According to KCL:
(A) Algebraic sum of all currents meeting at a point is zero
(B) Algebraic sum of all currents meeting at a point is not zero
(C) Algebraic sum of all currents meeting at a point is one
(D) All of these
6. . In any electric network, the current coming towards a point is equal to the outgoing current from that point is called:
(A) Point law
(B) Mesh law
(C) Superposition theorem
(D) Both a & b
7. . According to Kirchhoff's law in any closed circuit, the sum of IR drops and EMF is:
(A) Zero
(B) More than zero
(C) Positive
(D) Negative
8. . The resistive drop in a mesh due to current flowing in a clockwise direction must be taken as:
(A) Negative drop
(B) Positive drop
(C) Both a & b
(D) None of these
9. . The resistive drop in a mesh due to current flowing in an anti-clockwise direction must be taken:
(A) Negative
(B) Positive
(C) Neutral
(D) None of these
10. . Single closed path of an electric network is called:
(A) Mesh
(B) Node
(C) One-port network
(D) Two-port network
11. . Such junction or point in a circuit where two or more circuit elements are connected:
(A) Node
(B) Branch
(C) Mesh
(D) Loop
12. . That part of a network, which lies between two junctions, is called:
(A) Node
(B) Branch
(C) Mesh
(D) Loop
13. . The circuit having energy sources is called:
(A) Passive circuit
(B) Linear circuit
(C) Active circuit
(D) Non-linear circuit
14. . Ideal voltage source should have:
(A) Zero Internal Resistance
(B) Infinite Internal Resistance
(C) Large value of e.m.f.
(D) Low value of current
15. . In the superposition theorem, when we consider the effect of one voltage source, all the other voltage sources are:
(A) Shorted
(B) Opened
(C) Removed
(D) Undisturbed
16. . In the superposition theorem, when we consider the effect of one voltage source, all the other current sources are:
(A) Shorted
(B) Opened
(C) Removed
(D) Undisturbed
17. . In the superposition theorem, when we consider the effect of one current source, all the other current sources are:
(A) Shorted
(B) Opened
(C) Removed
(D) Undisturbed
18. . Superposition theorem is not applicable:
(A) Voltage Calculation
(B) Bilateral elements
(C) Power calculations
(D) Passive elements
19. . The concept on which the superposition theorem is based is:
(A) Reciprocity
(B) Duality
(C) Non-linearity
(D) Linearity
20. . Which of the following theorem is applicable for both linear and non-linear circuits?
(A) Superposition
(B) Thevenin’s
(C) Norton’s
(D) None of these
21. . For maximum transfer of power, the internal resistance of the source should be:
(A) Equal to load resistance
(B) Less than the load resistance
(C) Greater than the load resistance
(D) Zero
22. . Does maximum power transfer imply maximum efficiency?
(A) Yes
(B) No
(C) Sometimes
(D) Cannot be determined
23. . Efficiency of power transfer when the maximum transfer of power occurs is:
(A) 100%
(B) 0%
(C) 30%
(D) 50%
24. . The amount of energy supplied by the current in unit time is called:
(A) Electric energy
(B) Friction
(C) Resistance
(D) Electric power
25. . The maximum power is delivered to a circuit when source resistance is ________ load resistance:
(A) Greater than
(B) Equal to
(C) Less than
(D) Greater than or equal to
26. . Does maximum power transfer imply maximum efficiency?
(A) Yes
(B) No
(C) Sometimes
(D) Cannot be determined
27. . Under the condition of maximum power, efficiency is:
(A) 100%
(B) 0%
(C) 30%
(D) 50%
28. . The Thevenin’s voltage is the:
(A) Open circuit voltage
(B) Short circuit voltage
(C) Open circuit and short circuit voltage
(D) Neither open circuit nor short circuit voltage
29. . Thevenin’s resistance is found by:
(A) Shorting all voltage sources
(B) Opening all current sources
(C) Shorting all voltage sources and opening all current sources
(D) Opening all voltage sources and shorting all current sources
30. . Thevenin’s theorem is true:
(A) Linear networks
(B) Non-linear networks
(C) Both linear networks and nonlinear networks
(D) Neither linear networks nor non-linear networks
31. . In Thevenin’s theorem, Vth is:
(A) Sum of two voltage sources
(B) A single voltage source
(C) Infinite voltage sources
(D) 0
32. . Vth is found across the _________ terminals of the network:
(A) Input
(B) Output
(C) Neither input nor output
(D) Either input or output
33. . Which of the following is also known as the dual of Thevenin’s theorem?
(A) Norton’s theorem
(B) Superposition theorem
(C) Maximum power transfer theorem
(D) Millman’s theorem
34. . Which of the following is the right expression for converting from delta to star?
(A) R1 = RaRb / (Ra+Rb+Rc), R2 = RbRc / (Ra+Rb+Rc), R3 = RcRa / (Ra+Rb+Rc)
(B) R1 = Ra / (Ra+Rb+Rc), R2 = Rb / (Ra+Rb+Rc), Rc = / (Ra+Rb+Rc)
(C) R1 = RaRbRc / (Ra+Rb+Rc), R2 = RaRb / (Ra+Rb+Rc), R3 = Ra / (Ra+Rb+Rc)
(D) R1 = RaRbRc / (Ra+Rb+Rc), R2 = RaRbRc / (Ra+Rb+Rc), R3 = RaRbRc / (Ra+Rb+Rc)
35. . Rab is the resistance between terminals A and B, Rbc between B and C, and Rca between C and A. These 3 resistors are connected in delta connection. After transforming to star, the resistance at A will be:
(A) RabRac / (Rab+Rbc+Rca)
(B) Rab / (Rab+Rbc+Rca)
(C) RbcRac / (Rab+Rbc+Rca)
(D) Rac / (Rab+Rbc+Rca)
36. . Resistance at B after delta to star transformation:
(A) Rac / (Rab+Rbc+Rca)
(B) Rab / (Rab+Rbc+Rca)
(C) RbcRab / (Rab+Rbc+Rca)
(D) Rab / (Rab+Rbc+Rca)
37. . Resistance at C after delta to star transformation:
(A) Rac / (Rab+Rbc+Rca)
(B) Rab / (Rab+Rbc+Rca)
(C) RbcRac / (Rab+Rbc+Rca)
(D) Rab / (Rab+Rbc+Rca)
38. . Correct expression for star-delta conversion:
(A) R1 = RaRb/(Ra+Rb+Rc), R2 = RbRc/(Ra+Rb+Rc), R3 = RcRa/(Ra+Rb+Rc)
(B) R1 = Ra/(Ra+Rb+Rc), R2 = Rb/(Ra+Rb+Rc), Rc = / (Ra+Rb+Rc)
(C) R1 = Ra+Rb+RaRb/Rc, R2 = Rc+Rb+RcRb/Ra, R3 = Ra+Rc+RaRc/Rb
(D) R1 = RaRb/Rc, R2 = RcRb/Ra, R3 = RaRc/Rb
39. . Ra is resistance at A, Rb at B, Rc at C in star connection. After transforming to delta, resistance between A and C is:
(A) Ra+Rb+RaRb/Rc
(B) Ra+Rc+RaRc/Rb
(C) Ra+Rb+RaRc/Ra
(D) Ra+Rc+RaRb/Rc
40. . Resistance between A and B after star to delta:
(A) Rc+Rb+RaRb/Rc
(B) Ra+Rb+RaRc/Rb
(C) Ra+Rb+RaRb/Rc
(D) Ra+Rc+RaRc/Rb
41. . Resistance between B and C after star to delta:
(A) Rc+Rb+RcRb/Ra
(B) Rc+Rb+RaRb/Rc
(C) Ra+Rb+RaRc/Rb
(D) Rc+Rb+RcRa/Rb