Question
Download Solution PDFDetermine ID1 in the given circuit.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept
Assume both diodes to be ON. If the current in both diodes is positive, then the diodes are in forward biased condition.
In forward-biased conditions, the diode is replaced by its cut in voltage i.e. 0.7 V.
Calculation
-15 + 0.7 + 0.7 + 5(ID1) = 0
ID1 = 2.72 mA
-15 + 0.7 + 10(I1) + 5(ID1) = 0
I1 = 0.953 mA
ID2 = ID1 - I1
ID2 = 2.72 - 0.953
ID2 = 1.76 mA
Both the currents have positive values. Hence, our assumption is TRUE.
So, ID1 = 2.72 mA
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