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PN Junction Diode – 1 – 2

6. The forward characteristic of a diode has a slope of approximately 50 mA/V at a desired point. The approximate incremental resistance of the diode is :

(a) 50 Ω
(b) 35 Ω
(c) 20 Ω
(d) 10 Ω

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

7. The time required to switch a PN junction from ON to OFF is equal to :

(a) Zero
(b) Storage time
(c) Switching time
(d) Transition time

Answer
Answer : (c)

Explanation
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8. Fast switching of PN junction requires :

(a) A large current in reverse direction
(b) Zero current in reverse direction
(c) Reverse saturation current in reverse direction
(d) None of the above

Answer
Answer : (a)

Explanation
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9. The storage time of a PN junction :

(a) Decreases with increased reverse-bias
(b) Decreases with increased forward-bias
(c) Increases with increased reverse-bias
(d) Increases with increased forward-bias

Answer
Answer : (a)

Explanation
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10. The delay in the switching mode operation of a PN junction diode is mainly due to :

(a) Metallic contacts
(b) Different doping levels
(c) Minority charge storage in the junction during forward biased condition
(d) Majority carriers in forward biased condition

Answer
Answer : (b)

Explanation
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