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Assume the diodes are ideal, find the values of I and V
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- 1 mA, 0 V
- 2 mA, 5 V
- 1 mA, 1 V
- None of these
Correct Option: A
In such type of circuit arrangement at first sight it might not be obvious whether none, one or both diodes are conduction. In such type of circuit arrangement we should apply a plausible assumption, proceed with the analysis, and then check whether, we end up with a consistent solution or not.
Let us assumed that both diodes are conducting
i.e. VA = 0 and V = 0
The current through D2 can be determined as
| ID2 = | 1 mA. | |
| 10 |
apply KCL at point A.
| I + 1 = | |
| 5 |
or I = 1 mA.
Hence alternative (A) is the correct choice.
