Electronics MCQs January 8, 2026July 11, 2024 by u930973931_answers 20 min Score: 0 Attempted: 0/20 Subscribe 1. What does LED stand for? (A) Light Emitting Device (B) Long Electric Device (C) Light Emitting Diode (D) Linear Electric Diode 2. Which component is used to store electrical charge? (A) Resistor (B) Diode (C) Capacitor (D) Transistor 3. What is the SI unit of electric current? (A) Ohm (B) Watt (C) Volt (D) Ampere 4. Which material is commonly used in the construction of semiconductors? (A) Silicon (B) Silver (C) Copper (D) Aluminum 5. A diode allows current to flow in which direction? (A) Only reverse direction (B) Only forward direction (C) Both forward and reverse directions (D) None of the above 6. Which type of circuit consists of two separate loops with one loop containing the load and the other containing the source? (A) Series circuit (B) Combination circuit (C) Parallel circuit (D) Open circuit 7. What is the purpose of a fuse in an electrical circuit? (A) To increase resistance (B) To regulate current flow (C) To interrupt excessive current (D) To store electrical energy 8. What is the basic unit of capacitance? (A) Ohm (B) Volt (C) Henry (D) Farad 9. Which component is used to amplify or switch electronic signals and electrical power? (A) Resistor (B) Transistor (C) Capacitor (D) Inductor 10. Which device converts alternating current (AC) into direct current (DC)? (A) Capacitor (B) Transistor (C) Inductor (D) Diode 11. What does PCB stand for in electronics? (A) Primary Circuit Board (B) Plastic Coated Board (C) Power Control Block (D) Printed Circuit Board 12. Which type of motor is often used in cassette tape recorders and VCRs for fast forward and rewind functions? (A) Synchronous motor (B) Stepper motor (C) Universal motor (D) DC motor 13. What is the process by which an electrical signal is converted into sound in a speaker? (A) Amplification (B) Modulation (C) Oscillation (D) Transduction 14. Which semiconductor device is used to amplify or switch electronic signals and electrical power? (A) Resistor (B) Capacitor (C) Diode (D) Transistor 15. What is the function of a resistor in an electrical circuit? (A) To store electrical energy (B) To convert AC to DC (C) To amplify signals (D) To regulate current flow 16. Which component is used to store electrical energy in an electrical circuit? (A) Capacitor (B) Resistor (C) Inductor (D) Diode 17. Which component is used to control the flow of current in a circuit? (A) Capacitor (B) Resistor (C) Transistor (D) Inductor 18. In a series circuit, how does the current through each component compare? (A) It varies depending on the component (B) It is the same through each component (C) It increases with each component (D) It decreases with each component 19. What is the unit of electrical resistance? (A) Volt (B) Ampere (C) Ohm (D) Farad 20. Which type of material allows current to flow easily? (A) Insulator (B) Semiconductor (C) Conductor (D) Superconductor