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Question : 5
Total: 12
(i) Draw V-I characteristics of a p − n
(ii) Differentiate between the threshold voltage and the breakdown voltage for a diode.
(iii) Write the property of a junction diode which makes it suitable for rectification of ac voltages. 3
(ii) Differentiate between the threshold voltage and the breakdown voltage for a diode.
(iii) Write the property of a junction diode which makes it suitable for rectification of ac voltages. 3
Solution:
(i) V-I characteristics of p − n
(ii)
(iii) The property of junction diode which makes it suitable for rectification:
It exhibits high resistance when reverse biased and low resistance when forward biased.
(ii)
| Threshhold voltage | Breakdown voltage |
| The Forward voltage at which the current through the p-n junction starts increasing rapidly is known as threshold voltage. | Reverse voltage at which the p-n junction breakdown occurs is called as breakdown voltage. |
| The magnitude of this voltage is lowert than the breakdown voltage | The magnitude3 of this voltage is higher than the treshold voltage. |
(iii) The property of junction diode which makes it suitable for rectification:
It exhibits high resistance when reverse biased and low resistance when forward biased.
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