Circuit Theory – Multiple Choice Questions (MCQs)

1. 109. What is the SI unit of electric potential difference?

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

2. 110. The property of a material that opposes the flow of electric current is called:

   • A. Conductance
   • B. Resistance
   • C. Capacitance
   • D. Inductance

3. 111. A capacitor stores energy in the form of:

   • A. Magnetic field
   • B. Electric field
   • C. Kinetic energy
   • D. Heat

4. 112. The unit of capacitance is:

   • A. Henry
   • B. Farad
   • C. Ohm
   • D. Siemens

5. 113. An inductor stores energy in the form of:

   • A. Electric field
   • B. Magnetic field
   • C. Kinetic energy
   • D. Heat

6. 114. The unit of inductance is:

   • A. Farad
   • B. Ohm
   • C. Henry
   • D. Siemens

7. 115. Which element opposes sudden changes in current?

   • A. Resistor
   • B. Capacitor
   • C. Inductor
   • D. Diode

8. 116. Which element opposes sudden changes in voltage?

   • A. Resistor
   • B. Capacitor
   • C. Inductor
   • D. Transistor

9. 117. What is the formula for calculating total resistance in a series circuit?

   • A. R_total = R1 * R2 / (R1 + R2)
   • B. R_total = R1 + R2 + ...
   • C. R_total = 1/R1 + 1/R2 + ...
   • D. R_total = sqrt(R1^2 + R2^2)

10. 118. What is the formula for calculating total resistance in a parallel circuit?

    • A. R_total = R1 + R2 + ...
    • B. R_total = R1 * R2 / (R1 + R2) (for two resistors)
    • C. R_total = sqrt(R1^2 + R2^2)
    • D. R_total = R1 - R2

11. 119. The peak value of an AC voltage is 100V. What is its RMS value?

    • A. 70.7 V
    • B. 100 V
    • C. 141.4 V
    • D. 50 V

12. 120. The RMS value of a sinusoidal AC current is 10A. What is its peak value?

    • A. 7.07 A
    • B. 10 A
    • C. 14.14 A
    • D. 5 A