BASIC ELECTRONICS

Diode and its Application Quiz

1.For a Ge- PN junction the barrier potential is ________

A. 0.7V
B. 0.3V
C. 1.2V
D. 230V

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B. 0.3V

2. Static forward resistance of a diode is given by

A. ratio of forward d.c. current to forward d.c. voltage
B. ratio of forward d.c. voltage to forward d.c. current
C. ratio of forward d.c. voltage to reverse d.c. voltage
D. ratio of forward d.c. current to reverse d.c. current

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B. ratio of forward d.c. voltage to forward d.c. current

3. Number of diode/s required for a half bridge rectifier is/are

A. 1
B. 2
C. 4
D. 3

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A. 1

4.Reverse biased characteristics of a diode can be plotted in________

A. Second quadrant
B. First quadrant
C. Third quadrant
D. Fourth quadrant

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C. Third quadrant

5.A Zener diode is generally operated for current __________

A. between I_{z (min) and}I_{z (max)}
B. greater than I_{z (max).}
C.less than I_{z (min) .}
D.current does not put any limit on its operation.

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A. between I_{z (min) and}I_{z (max)}

6. The depletion region has________________

A. very few carriers
B. large number of carriers
C. no carriers
D. uncertain

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A. very few carriers

7. The characteristics of a diode are ______________ by the network in which it is employed.

A. altered
B. unaltered
C. sometimes changed
D. can't say

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B. unaltered

8. In a LED,___________________

A. longer leg is anode.
B. smaller leg is anode.
C. Both legs are of equal size.
D. Though the lengths are unequal it does not indicate anode or cathode.

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A. bigger leg is anode.

LED has one leg longer then the other one, the longer one is positive and the smaller one is negative. If LED has same length of legs then look inside LED for two kind of triangle pieces and one of them will be smaller which is positive and other one is negative.