Question

If diode cut-in voltage is 0.6 V. The diode status are

• A. only D₁ on
• B. only D₂ on
• C. both D₁ & D₂ on
• D. both D₁ & D₂ off

Hint:

Compare source voltage differences with 0.6V cut-in to decide diode ON/OFF status.

Answer 1

The Correct Option is C

Given:
- Left source = 6.4 V
- Right source = 6.8 V
- Middle node between 220Ω and 680Ω
Check forward bias condition:
- D1: \( 6.4 - 0.6 = 5.8 \) V → forward biased
- D2: \( 6.8 - 0.6 = 6.2 \) V → also forward biased
So, both diodes have sufficient voltage>0.6V → both are ON.