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Physics · 2024 · 3 marks
Semiconductor Electronics: Materials, Devices and Simple Circuitsp-n Junction3 marksApplyshort answer
CBSE 2024 · Region 3 · Set 1 · Q28
(a) Draw the circuit diagrams for obtaining the V - I characteristics of a p-n junction diode. Explain briefly the salient features of the V - I…
(a)
Draw the circuit diagrams for obtaining the $\displaystyle \mathrm{V}-\mathrm{I}$ characteristics of a p-n junction diode. Explain briefly the salient features of the V - I characteristics in (i) forward biasing, and (ii) reverse biasing.
Marking-scheme solution
(a)
(a)
Drawing the circuit diagram for V-I characteristics Salient features of V-I characteristics in
(i) Forward biasing
(ii) Reverse biasing
[any one circuit diagram]
Salient features
(i)
Forward biasing- After threshold voltage or cut in voltage diode current increases significantly (exponentially), even for a small increase in the diode bias voltage.
(ii)
Reverse biasing- Current is very small \(\displaystyle (\sim \mu \mathrm{A})\) and almost remains constant and it increases rapidly after breakdown voltage.
OR
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