Circuit Theory – Multiple Choice Questions (MCQs)

1. 133. 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

2. 134. 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

3. 135. 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

4. 136. 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

5. 137. Nodal analysis is based on:

   • A. KVL
   • B. KCL
   • C. Ohm's Law
   • D. Superposition Theorem

6. 138. Mesh analysis is based on:

   • A. KCL
   • B. KVL
   • C. Ohm's Law
   • D. Norton's Theorem

7. 139. What is a "dependent source"?

   • A. A source whose value is independent of other circuit variables
   • B. A source whose value depends on a voltage or current elsewhere in the circuit
   • C. A battery
   • D. A current source

8. 140. An ideal voltage source has:

   • A. Infinite internal resistance
   • B. Zero internal resistance
   • C. Negative internal resistance
   • D. Variable internal resistance

9. 141. An ideal current source has:

   • A. Infinite internal resistance
   • B. Zero internal resistance
   • C. Negative internal resistance
   • D. Variable internal resistance

10. 142. What is "mutual inductance"?

    • A. The inductance of a single coil
    • B. The inductance between two coils due to the magnetic field of one linking with the other
    • C. The resistance of a coil
    • D. The capacitance between two coils

11. 143. The coupling coefficient (k) between two coils indicates:

    • A. The efficiency of energy transfer
    • B. The degree of magnetic coupling between them
    • C. The resistance of the coils
    • D. The voltage induced

12. 144. What is "phasor" representation in AC circuits?

    • A. A vector representing the instantaneous value of a sinusoidal quantity
    • B. A complex number that represents the amplitude and phase of a sinusoidal quantity
    • C. A real number
    • D. A scalar