Circuits Analysis MCQs January 8, 2026July 11, 2024 by u930973931_answers 42 min Score: 0 Attempted: 0/42 Subscribe 1. What is the SI unit of electric charge? (A) Volt (B) Ampere (C) Ohm (D) Coulomb 2. Which of the following materials is a good conductor of electricity? (A) Glass (B) Copper (C) Rubber (D) PVC 3. In which type of circuit are the elements connected end-to-end with no branching? (A) Series (B) Parallel (C) Series-parallel (D) None of the above 4. What is the unit of electrical resistance? (A) Farad (B) Tesla (C) Henry (D) Ohm 5. Which law states that voltage across a resistor is directly proportional to the current passing through it? (A) Watt’s law (B) Kirchhoff’s voltage law (C) Kirchhoff’s current law (D) Ohm’s law 6. Which type of material allows electric charges to flow freely? (A) Conductor (B) Semiconductor (C) Insulator (D) Dielectric 7. What is the SI unit of electric potential difference? (A) Coulomb (B) Ampere (C) Volt (D) Ohm 8. Which instrument is used to measure electric current? (A) Voltmeter (B) Multimeter (C) Galvanometer (D) Ammeter 9. What does AC stand for in electrical terms? (A) Alternating Capacitance (B) Alternating Charge (C) Alternating Current (D) Alternating Circuit 10. What is the standard voltage of a typical household electrical outlet in most countries? (A) 110 V (B) 220 V (C) 240 V (D) 120 V 11. Which device stores electrical energy temporarily in a circuit? (A) Resistor (B) Inductor (C) Capacitor (D) Transformer 12. What is the purpose of a diode in an electrical circuit? (A) To store energy (B) To control voltage (C) To rectify AC to DC (D) To amplify signals 13. Which law states that the algebraic sum of currents at a junction is zero? (A) Ohm’s law (B) Kirchhoff’s voltage law (C) Watt’s law (D) Kirchhoff’s current law 14. Which motor operates on interaction between stator and rotor magnetic fields? (A) Induction motor (B) DC motor (C) Synchronous motor (D) Stepper motor 15. Which device protects electrical appliances from power surges? (A) Circuit breaker (B) Fuse (C) Transformer (D) Relay 16. In an electrical circuit, what does a resistor do? (A) Increases current (B) Limits current flow (C) Stores energy (D) Decreases voltage 17. Which phenomenon occurs when voltage is induced by a changing magnetic field? (A) Inductance (B) Capacitance (C) Electromagnetic induction (D) Resistance 18. What is the unit of frequency? (A) Tesla (B) Watt (C) Joule (D) Hertz 19. Which law relates electric flux through a closed surface to enclosed charge? (A) Faraday’s law (B) Coulomb’s law (C) Ampère’s law (D) Gauss’s law 20. Which type of generator produces DC output? (A) Alternator (B) Dynamo (C) Transformer (D) Rectifier 21. What is the function of an inductor in a circuit? (A) To store magnetic energy (B) To control voltage (C) To provide resistance (D) To store energy 22. What is the primary function of a transformer? (A) Convert AC to DC (B) Amplify signals (C) Decrease current (D) Increase voltage 23. Which material has properties between conductors and insulators? (A) Semiconductor (B) Insulator (C) Conductor (D) Dielectric 24. Which component stores electrical charge? (A) Resistor (B) Inductor (C) Capacitor (D) Transformer 25. What is the SI unit of power? (A) Watt (B) Volt (C) Ampere (D) Ohm 26. Which device converts electrical energy into mechanical energy? (A) Capacitor (B) Resistor (C) Diode (D) Motor 27. What is the unit of electrical conductance? (A) Ohm (B) Henry (C) Siemens (D) Coulomb 28. Which circuit has multiple paths for current flow? (A) Series (B) Parallel (C) Series-parallel (D) None of the above 29. Which law states that sum of voltages in a closed loop is zero? (A) Ohm’s law (B) Watt’s law (C) Kirchhoff’s current law (D) Kirchhoff’s voltage law 30. Which material has very high resistance to electric current? (A) Insulator (B) Conductor (C) Semiconductor (D) Dielectric 31. What is the purpose of a rectifier? (A) Convert AC to DC (B) Store energy (C) Amplify signals (D) Control voltage 32. Which law describes force between two electric charges? (A) Coulomb’s law (B) Ohm’s law (C) Faraday’s law (D) Ampère’s law 33. What is the SI unit of capacitance? (A) Gauss (B) Henry (C) Tesla (D) Farad 34. Which connection increases total resistance? (A) Series (B) Parallel (C) Series-parallel (D) Depends on values 35. What is the purpose of a fuse? (A) Regulate voltage (B) Store energy (C) Protect against overcurrent (D) Convert AC to DC 36. Which device changes voltage level? (A) Fuse (B) Capacitor (C) Relay (D) Transformer 37. What is the unit of magnetic flux density? (A) Ampere-turn (B) Weber (C) Gauss (D) Tesla 38. Which law relates magnetic field to electric current? (A) Ohm’s law (B) Ampère’s law (C) Coulomb’s law (D) Faraday’s law 39. What is the function of a relay? (A) Convert AC to DC (B) Amplify signals (C) Control high-power circuits using low power (D) Protect against overcurrent 40. Which component converts mechanical motion into electrical energy? (A) Capacitor (B) Resistor (C) Diode (D) Generator 41. What is the SI unit of magnetic flux? (A) Weber (B) Tesla (C) Gauss (D) Ampere-turn 42. Which law states that induced EMF equals rate of change of magnetic flux? (A) Ohm’s law (B) Coulomb’s law (C) Faraday’s law (D) Ampère’s law