Circuit Theory – Multiple Choice Questions (MCQs)

1. 73. What is the "quality factor (Q)" of a series RLC circuit?

   • A. wL / R
   • B. R / (wL)
   • C. R / (wC)
   • D. wC / R

2. 74. What is "damping ratio" in an RLC circuit?

   • A. A measure of resonance
   • B. A measure of how oscillations in a system decay after a disturbance
   • C. A measure of resistance
   • D. A measure of capacitance

3. 75. The "cut-off frequency" of a filter is the frequency at which the output power is reduced to:

   • A. Half of the maximum power
   • B. Zero
   • C. Maximum
   • D. Twice the maximum power

4. 76. What is a "band-pass filter"?

   • A. A filter that passes all frequencies
   • B. A filter that allows frequencies within a specific range to pass
   • C. A filter that blocks all frequencies
   • D. A filter that blocks a specific range of frequencies

5. 77. What is a "low-pass filter"?

   • A. A filter that allows high frequencies to pass
   • B. A filter that allows frequencies below a certain cut-off frequency to pass
   • C. A filter that blocks low frequencies
   • D. A filter that passes only a specific frequency

6. 78. What is a "high-pass filter"?

   • A. A filter that allows low frequencies to pass
   • B. A filter that allows frequencies above a certain cut-off frequency to pass
   • C. A filter that blocks high frequencies
   • D. A filter that passes only DC

7. 79. What is the "supernode" method in nodal analysis?

   • A. A node with only one branch
   • B. A hypothetical node that connects two non-reference voltage nodes with a voltage source between them
   • C. A node connected to ground
   • D. A node with no current

8. 80. What is the "supermesh" method in mesh analysis?

   • A. A mesh with only one branch
   • B. A hypothetical mesh created when a current source is common to two meshes
   • C. A mesh with no voltage source
   • D. A mesh with infinite resistance

9. 81. The "reciprocity theorem" is applicable to circuits containing:

   • A. Only independent sources
   • B. Dependent sources
   • C. Mutual inductance
   • D. Unilateral elements

10. 82. What is "duality" in circuit theory?

    • A. The relationship between current and voltage
    • B. The concept that two circuits have the same mathematical form of their equations
    • C. The relationship between resistance and capacitance
    • D. The similarity between series and parallel circuits

11. 83. What is a "pole" in system analysis?

    • A. A frequency at which the system gain is zero
    • B. A frequency at which the system response goes to infinity
    • C. A point on the real axis
    • D. A point on the imaginary axis

12. 84. What is a "zero" in system analysis?

    • A. A frequency at which the system response goes to infinity
    • B. A frequency at which the system gain is zero
    • C. A point on the real axis
    • D. A point on the imaginary axis