IMPORTANT MCQs FOR ELECTRONICS CVac.pdf

IMPORTANT MCQs FOR ELECTRONICS-CVac SEMCONDUCTOR 1. How does a Semiconductor behave at absolute Zero temperature. a. Conductor. b. Insulator. c. Super Conductor. d. Extrinsic Semiconductor. 2. What are the current carriers in Sem...

IMPORTANT MCQs FOR ELECTRONICS-CVac SEMCONDUCTOR 1. How does a Semiconductor behave at absolute Zero temperature. a. Conductor. b. Insulator. c. Super Conductor. d. Extrinsic Semiconductor. 2. What are the current carriers in Semiconductor. a. Electron & Proton. b. Electron & Photon. c. Electron & Neutrons. d. Electron & holes. 3. Identify the types of materials a. N-type. b. P-type. c. Conductor. d. Intrinsic semiconductor. 4. A solar cell is a ___________. a. P-type b. N-type. c. Intrinsic Semiconductor. d. P-n junction. 5. Which region of the transistor is highly dopped. a. Collector. b. Base. c. Emitter. d. Both a & b. 6. If a rectifier has 2 diodes, it is  a. Quarter wave rectifier. b. Full-wave rectifier. c. Half-wave rectifier. d. Peak to peak rectifier. 7. Ge, is a ________. a. Insulator. b. Compound Semiconductor. c. Extrinsic Semiconductor. d. Intrinsic Semiconductor. 8. Which type of material is obtain when an intrinsic semiconductor is dopped with pentavalent impurity. a. P-type semiconductor. b. Allow semiconductor. c. N-type semiconductor. d. Insulator. 9. If reverse biased voltage increases the depletion width of a P-n junction diode ________. a. Increase. b. Decrease. c. Remain same. d. Varieses. 10. The I-V equation of the P-n junction diode is known as. a. Coulombs law. b. Faraday’s law. c. Shockle equation. d. Einstein’s relation. 11. In 7-segment display how many LEDs are used. a. 7 b. 8 c. 9 d. 10. 12. What should be biasing of the LED. a. Reverse bias. b. Forward Bias. c. No bias is required.  d. Forward bias then reverse bias. 13. A gener diode is used as _________. a. An amplifier. b. An oscillator. c. Filter. d. A voltage regulator. COMMUNICATION 14. What do you mean by the term Communication. a. Transfer of Knowledge. b. Transfer of Fund. c. Transfer of information. d. Transfer of Bytes. 15. Name of the device which convert energy from one form to another. a. Modem. b. Repeater. c. Transducer. d. Transformer. 16. Identify the type of modulation when the frequency of modulated wave is equal to the carrier to the carrier wave. a. Frequency modulation. b. Amplitude modulation. c. Carrier modulation. d. Pulse modulation. 17. The capacity of A.C is expressed in a. Watt. b. Hp. c. Tons. d. KWh. 18. What is used as a circuit breaker a. Fuse. b. Switch. c. Register. d. Re-settable protective Device. 19. A short circuit is identified by a. No current flow.  b. High current flow. c. Voltage drops. d. Voltage rise. 20. A fuse is connected a. In series with circuit. b. In parallel with circuit. c. Either in series on parallel with circuit. d. Neither in series nor parallel with circuit. 21. Inverter converts ________ a. DC power to DC power. b. DC power to AC power. c. AC power to AC power. d. AC power to DC power. 22. Woking principle of washing machine is a. Diffusion. b. Dialysis. c. Centrifugation. d. Pressure power. 23. Which part of the washing machine actually perform the cleaning operating of clothes. a. Timer. b. Agitator. c. Tab. d. Drains. 24. A microwave oven uses wases with a a. Small wave length in visible range. b. Large wave length in visible range. c. Small wave length in invisible range. d. Large wave length in invisible range. 25. The optical properties of liquid crystal depend on the direction of the _____. a. Air. b. Water. c. Light. d. Solid. 26. Which of the following is not a part of the regulated DC power supply.  a. Rectifier. b. Regulator. c. Filter. d. Oscillator. 27. In transmission lines the cross arms are made of _______. a. Cu. b. Rcc. c. Wood. d. Stell. 28. BJT is a ________control device. a. Power. b. Voltage. c. Current. d. Energy. 29. The majority carriers in the emitter of P-n-P transistor ________. a. Free electron. b. Holes. c. Trivalent atoms. d. Pentavalent atoms. 30. The following atoms can act as a donor in silicon. a. B. (Boron). b. In (Indium). c. P (Phosphorus). d. Ga (Gallium).