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Assuming ideal diode models, find status of diodes D, and D2 (on or off) D2 2Ω 2. Assuming ideal diode models, find status of diodes D1 and D2 (on or off) D2 8Ω 1033128175

Question-Answer › Category: Electrical Engineering › Assuming ideal diode models, find status of diodes D, and D2 (on or off) D2 2Ω 2. Assuming ideal diode models, find status of diodes D1 and D2 (on or off) D2 8Ω 1033128175
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shay asked 1 year ago
Assuming ideal diode models, find status of diodes D, and D2 (on or off) D2 2Ω 2. Assuming ideal diode models, find status of diodes D1 and D2 (on or off) D2 8Ω 10

1. Assuming ideal diode models, find status of diodes D, and D2 (on or off) D2 2Ω 2. Assuming ideal diode models, find status of diodes D1 and D2 (on or off) D2 8Ω 10

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Sazid Ahmad answered 1 year ago

1) For ideal diode “on” means short circuit “off” means open circuit
using that Let us assume that D1 is on D2 is off
The current through diode D1 is as current is positive our assumption that Diode D1 is correct
Let us find voltage across diode D2 negative sign because we are measuring voltage assuming anode of diodes positive as it comes out
To check our assumptions that diode is on or off correct or not ,to check whether it is on find the current from anode to cathode of that diode if it is >0 our assumption is correct similarly check the anode to cathode voltage across diode which is assumed off
Ans) 1) For Ideal dlode on means short clrcult off means open clrcult using that Let us assume that D1 Is on D2 Is off The current through dlode D1 s 12 8+2 Di = 1.2.4 ID, 1.2 A>0 Let us find voltage across dlode D2 as current Is posltlve our assumptlon that Dlode D1 Is correct negatlve slgn because we are measurlng voltage assumlng anode of dlodes posltlve as It comes out dlode Is reverse blased and It Is off hence our assumptlon Is correct here also ,hence answer Is Di(on), D2 off) You can make other assumptlons also Inltlally but you finally end up thls Is the correct assumptlon 2) Let us assume that D1 Is off D2 ls on here The current through dlode D2 ls 15 10 as current Is positlve our assumptlon that Dlode D2 Is correct Let us find voltage across dlode D Vp, -15 - ID 8 15 2.58-5 V using kirchoffs voltage law dlode Is reverse blased and It ls off hence our assumptlon Is correct here also ,hence answer Is Di(off), D2(on) To check our assumptlons that dlode ls on or off correct or not ,to check whether It Is on find the current from anode to cathode of that dlode If It Is >0 our assumptlon Is correct slmllarly check the anode to cathode voltage across dlode whlch Is assumed off ,If It Is less than zero our assumptlon Is correct

 

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