Circuit Theory – Multiple Choice Questions (MCQs)

1. 97. What is a "tie-set" or "fundamental loop"?

   • A. A loop that includes only one cotree branch and the remaining tree branches
   • B. A loop that includes only tree branches
   • C. A loop that includes no branches
   • D. A loop that includes all branches

2. 98. The "matrix method" of circuit analysis is based on:

   • A. Trial and error
   • B. Systematic application of KCL and KVL
   • C. Graphical solutions
   • D. Approximation

3. 99. What is "source transformation"?

   • A. Converting a voltage source to a current source or vice versa
   • B. Changing the value of a source
   • C. Adding more sources
   • D. Removing sources

4. 100. The term "power factor" is defined as the cosine of the angle between:

   • A. Voltage and current phasors
   • B. Resistance and reactance
   • C. Active power and reactive power
   • D. Apparent power and reactive power

5. 101. What is the SI unit of electric current?

   • A. Volt
   • B. Ampere
   • C. Ohm
   • D. Watt

6. 102. Ohm's Law states that:

   • A. V = IR
   • B. V = I/R
   • C. V = R/I
   • D. V = I^2R

7. 103. Which of the following is a passive component?

   • A. Transistor
   • B. Diode
   • C. Resistor
   • D. Op-Amp

8. 104. What is the unit of electrical resistance?

   • A. Volt
   • B. Ampere
   • C. Ohm
   • D. Farad

9. 105. Kirchhoff's Current Law (KCL) is based on the conservation of:

   • A. Energy
   • B. Charge
   • C. Momentum
   • D. Power

10. 106. Kirchhoff's Voltage Law (KVL) is based on the conservation of:

    • A. Energy
    • B. Charge
    • C. Momentum
    • D. Power

11. 107. What is the reciprocal of resistance?

    • A. Conductance
    • B. Reactance
    • C. Impedance
    • D. Susceptance

12. 108. The unit of conductance is:

    • A. Ohm
    • B. Siemens (or Mho)
    • C. Farad
    • D. Henry