1. .1 Net charge on PN junction area is
(A) Positive
(B) Neutral
(C) Negative
(D) None of these
2. .2 A diode has terminals
(A) Two
(B) Three
(C) Four
(D) None of these
3. .4 Potential barrier for silicon (Si) is
(A) 0.3V
(B) 0.7V
(C) 0.5V
(D) 0.9V
4. .5 Potential barrier for germanium (Ge) is
(A) 0.5V
(B) 0.3V
(C) 0.7V
(D) 0.9V
5. .6 The process of converting AC voltage to DC voltage is
(A) Amplification
(B) None of these
(C) Both a & b
(D) Rectification
6. .7 The number of diode(s) used in half wave rectifier
(A) One
(B) Two
(C) Three
(D) Four
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 negative
8. .9 The number of diode(s) used in full wave bridge rectifier
(A) One
(B) Four
(C) Three
(D) Two
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) Negative
10. .11 The number of diode(s) used in full wave center tapped transformer
(A) One
(B) Two
(C) Three
(D) Four
11. .12 During forward biasing of a diode, depletion layer
(A) Expands
(B) Squeezes
(C) Both a & b
(D) None of the above
12. .13 During reverse biasing of a diode, depletion layer
(A) Both a & b
(B) Squeezes
(C) Expands
(D) None of the above
13. .15 A sinusoidal waveform has amplitude
(A) Constant
(B) None of the above
(C) Both a & b
(D) Variable
14. .16 A DC voltage has amplitude
(A) Both a & b
(B) Variable
(C) Constant
(D) None of the above
15. .17 AC components in the rectified output are called
(A) Impulses
(B) Both a & b
(C) Ripples
(D) None of the above
16. .18 The ratio of AC components to the DC in rectified output
(A) Form Factor
(B) Peak Factor
(C) Crust Factor
(D) Ripple Factor
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 above
18. .20 How many diodes forward biased at a time in full wave bridge rectifier
(A) 1
(B) 2
(C) 3
(D) 4