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Circuit Theory – Multiple Choice Questions (MCQs)

25. The unit of admittance is:
- A. Ohm
- B. Siemens
- C. Farad
- D. Henry
26. What is the power factor in a purely resistive AC circuit?
- A. 0
- B. 0.5
- C. 1
- D. 0.707
27. What is the power factor in a purely inductive AC circuit?
- A. 0
- B. 0.5
- C. 1
- D. 0.707
28. What is the power factor in a purely capacitive AC circuit?
- A. 0
- B. 0.5
- C. 1
- D. 0.707
29. The quality factor (Q-factor) of a series RLC circuit is a measure of its:
- A. Resistance
- B. Selectivity
- C. Inductance
- D. Capacitance
30. What is "superposition theorem" used for?
- A. To find power in linear circuits
- B. To find current and voltage in linear circuits with multiple sources
- C. To find resistance
- D. To find capacitance
31. Superposition theorem cannot be used for calculating:
- A. Current
- B. Voltage
- C. Power
- D. Resistance
32. Norton's theorem states that any linear circuit can be replaced by an equivalent circuit containing:
- A. A voltage source and a series resistor
- B. A current source and a parallel resistor
- C. A capacitor and an inductor
- D. Two voltage sources
33. Thevenin's theorem states that any linear circuit can be replaced by an equivalent circuit containing:
- A. A voltage source and a series resistor
- B. A current source and a parallel resistor
- C. A capacitor and an inductor
- D. Two current sources
34. Maximum power transfer theorem states that maximum power is transferred from a source to a load when:
- A. Load impedance equals source impedance
- B. Load impedance is twice source impedance
- C. Load impedance is half source impedance
- D. Load impedance is zero
35. What is a "mesh" in circuit analysis?
- A. A closed loop in a circuit that does not contain any other closed loops within it
- B. An open path
- C. A junction
- D. A branch
36. What is a "node" in circuit analysis?
- A. A branch
- B. A junction where two or more circuit elements meet
- C. A closed loop
- D. An open path

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Circuit Theory – Multiple Choice Questions (MCQs)

25. The unit of admittance is:

26. What is the power factor in a purely resistive AC circuit?

27. What is the power factor in a purely inductive AC circuit?

28. What is the power factor in a purely capacitive AC circuit?

29. The quality factor (Q-factor) of a series RLC circuit is a measure of its:

30. What is "superposition theorem" used for?

31. Superposition theorem cannot be used for calculating:

32. Norton's theorem states that any linear circuit can be replaced by an equivalent circuit containing:

33. Thevenin's theorem states that any linear circuit can be replaced by an equivalent circuit containing:

34. Maximum power transfer theorem states that maximum power is transferred from a source to a load when:

35. What is a "mesh" in circuit analysis?

36. What is a "node" in circuit analysis?

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