Chapter 2 SEMICONDUCTOR DIODES MCQs 18 min Score: 0 Attempted: 0/18 Subscribe 1. .1 Net charge on PN junction area is (A) Positive (B) Neutral (C) Negative (D) None of theseShow All Answers 2. .2 A diode has terminals (A) Two (B) Three (C) Four (D) None of theseShow All Answers 3. .4 Potential barrier for silicon (Si) is (A) 0.3V (B) 0.7V (C) 0.5V (D) 0.9VShow All Answers 4. .5 Potential barrier for germanium (Ge) is (A) 0.5V (B) 0.3V (C) 0.7V (D) 0.9VShow All Answers 5. .6 The process of converting AC voltage to DC voltage is (A) Amplification (B) None of these (C) Both a & b (D) RectificationShow All Answers 6. .7 The number of diode(s) used in half wave rectifier (A) One (B) Two (C) Three (D) FourShow All Answers 7. .8 Half wave rectifier converts only ___ half cycle of AC to DC voltage (A) Positive (B) Negative (C) None of the above (D) Either positive or negativeShow All Answers 8. .9 The number of diode(s) used in full wave bridge rectifier (A) One (B) Four (C) Three (D) TwoShow All Answers 9. .10 Full wave rectifier converts half cycle(s) of AC to DC voltage (A) Positive (B) Both halves (C) Either positive or negative (D) NegativeShow All Answers 10. .11 The number of diode(s) used in full wave center tapped transformer (A) One (B) Two (C) Three (D) FourShow All Answers 11. .12 During forward biasing of a diode, depletion layer (A) Expands (B) Squeezes (C) Both a & b (D) None of the aboveShow All Answers 12. .13 During reverse biasing of a diode, depletion layer (A) Both a & b (B) Squeezes (C) Expands (D) None of the aboveShow All Answers 13. .15 A sinusoidal waveform has amplitude (A) Constant (B) None of the above (C) Both a & b (D) VariableShow All Answers 14. .16 A DC voltage has amplitude (A) Both a & b (B) Variable (C) Constant (D) None of the aboveShow All Answers 15. .17 AC components in the rectified output are called (A) Impulses (B) Both a & b (C) Ripples (D) None of the aboveShow All Answers 16. .18 The ratio of AC components to the DC in rectified output (A) Form Factor (B) Peak Factor (C) Crust Factor (D) Ripple FactorShow All Answers 17. .19 The leakage current across a PN junction is due to (A) Majority carriers (B) Minority carriers (C) Junction capacitance (D) None of the aboveShow All Answers 18. .20 How many diodes forward biased at a time in full wave bridge rectifier (A) 1 (B) 2 (C) 3 (D) 4Show All Answers