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What current should flow through D2 diode? Consider the values given in circuit below.

 

Q. What current should flow through D2 diode? Consider the values given in circuit below








1. Identify Diode States

  • D₁: Forward-biased → ON
  • D₂: Forward-biased → ON

Assume each diode has a voltage drop of 0.7 V.

2. Define Node Voltages

Bottom node = 0 V

Top node (VA) = 0.7 V (due to D₂)

Voltage before D₁ = 1.4 V

3. Current through 5.6 kฮฉ Resistor

Using KVL:

20V − 0.7V − 0.7V − I × 5.6k = 0

I = (20 − 1.4) / 5600 = 3.32 mA

4. Current through 3.3 kฮฉ Resistor

I = 0.7 / 3300 = 0.212 mA

5. Find ID2

ID2 = 3.32 − 0.212 = 3.11mA

Final Answer: ID2 ≈ 3.11mA
option c is correct
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