50 Professional Questions with Complete Answers
Basic Knowledge
Q1. Diode ka Reference Designator kya hota hai?
Answer:
D
Example:
- D1
- D15
- D230
Q2. Diode ka Full Name kya hota hai?
Answer:
Diode
Q3. Diode ka symbol kaisa hota hai?
Answer:
Diode ke do terminals hote hain:
- Anode (A)
- Cathode (K)
Schematic mein diode ka symbol current ko ek direction mein pass hone ko show karta hai.
Q4. Diode ke kitne terminals hote hain?
Answer:
2
- Anode
- Cathode
Q5. Diode ka main kaam kya hota hai?
Answer:
Current ko sirf ek direction mein pass karna.
Q6. Diode current kis direction mein pass karta hai?
Answer:
Anode → Cathode
Forward Bias mein.
Q7. Reverse direction mein diode kya karta hai?
Answer:
Current ko block karta hai.
Q8. Laptop motherboard mein diode kahan use hota hai?
Answer:
- DC Input
- Charger Circuit
- USB
- HDMI
- Battery
- LCD
- Protection Circuit
- Audio
- Type-C
Q9. Diode ki unit kya hoti hai?
Answer:
Diode ki koi measurement unit nahi hoti.
Isay Forward Voltage se check kiya jata hai.
Q10. Multimeter mein diode kis mode se check hota hai?
Answer:
Diode Mode
Diode Testing
Q11. Silicon diode ki Forward Voltage kitni hoti hai?
Answer:
0.5V–0.7V
Q12. Schottky diode ki Forward Voltage kitni hoti hai?
Answer:
0.15V–0.40V
Q13. LED ki Forward Voltage kitni hoti hai?
Answer:
Lagbhag:
- Red LED → 1.8V–2.2V
- White/Blue LED → 2.8V–3.5V
Q14. Diode ko multimeter se kaise check karte hain?
Answer:
- Meter Diode Mode par karo.
- Red Probe → Anode
- Black Probe → Cathode
Forward Reading aani chahiye.
Reverse mein OL aana chahiye.
Q15. Agar dono taraf OL aaye to?
Answer:
Diode Open hai.
Q16. Agar dono taraf 0 ya Beep aaye to?
Answer:
Diode Short hai.
Q17. Agar sirf ek taraf 0.6V aaye aur doosri taraf OL aaye to?
Answer:
Diode bilkul theek hai.
Q18. Board par diode check karte waqt dikkat kyun hoti hai?
Answer:
Parallel components reading ko affect karte hain.
Q19. Agar reading doubtful ho to?
Answer:
Ek side lift karke check karo.
Q20. Reverse Bias kya hota hai?
Answer:
Anode Negative
Cathode Positive
Current pass nahi hota.
Diode Types
Q21. Normal Diode kya hota hai?
Answer:
Sirf ek direction mein current pass karta hai.
Q22. Schottky Diode kya hota hai?
Answer:
Fast Switching diode.
Forward Voltage kam hoti hai.
Q23. Zener Diode kya hota hai?
Answer:
Voltage Regulation ke liye use hota hai.
Q24. TVS Diode kya hota hai?
Answer:
Surge aur ESD Protection ke liye.
Q25. LED kya hoti hai?
Answer:
Current pass hone par light produce karti hai.
Practical Questions
Q26. Laptop mein DC Jack ke paas diode kyun lagaya jata hai?
Answer:
Protection ke liye.
Q27. USB Port ke paas diode kyun hota hai?
Answer:
ESD Protection.
Q28. HDMI Port ke paas diode kyun hota hai?
Answer:
Static Voltage Protection.
Q29. Battery Circuit mein diode kyun hota hai?
Answer:
Reverse Current rokne ke liye.
Q30. Charger Circuit mein diode ka kya kaam hota hai?
Answer:
Current Direction Control aur Protection.
Fault Finding
Q31. Diode Short ho jaye to symptoms?
Answer:
- Laptop Dead
- Adapter Short
- Rail Short
- Heating
Q32. Diode Open ho jaye to?
Answer:
- Charging Problem
- Voltage Missing
- Boot Problem
Q33. Reverse Polarity se diode par kya asar hota hai?
Answer:
Diode damage ho sakta hai.
Q34. Voltage Spike se kya hota hai?
Answer:
Protection diode short ho sakta hai.
Q35. Water Damage mein diode ka kya issue hota hai?
Answer:
Corrosion aur leakage.
Advanced Questions
Q36. Diode aur Resistor mein kya difference hai?
Answer:
Resistor dono directions mein resistance deta hai.
Diode sirf ek direction mein current pass karta hai.
Q37. Diode aur Capacitor mein kya difference hai?
Answer:
Capacitor charge store karta hai.
Diode current control karta hai.
Q38. Diode aur MOSFET mein kya difference hai?
Answer:
MOSFET electronic switch hai.
Diode one-way valve ki tarah kaam karta hai.
Q39. TVS Diode ka full form kya hai?
Answer:
Transient Voltage Suppression Diode.
Q40. Zener Diode kis mode mein kaam karta hai?
Answer:
Reverse Breakdown Region.
Shop Level Questions
Q41. Motherboard par diode identify kaise karte ho?
Answer:
Reference "D" dekh kar.
Q42. Boardview mein diode kaise dhoondte ho?
Answer:
Reference Designator D search karte hain.
Q43. Schematic mein diode ka symbol dekh kar kya identify karte ho?
Answer:
Anode aur Cathode.
Q44. Kya diode ko continuity mode mein check karna sahi hai?
Answer:
Nahi.
Diode Mode best hai.
Q45. Laptop dead hai aur input diode short hai. Kya hoga?
Answer:
19V aage pass nahi hogi.
Laptop ON nahi hoga.
Q46. Kya diode replace karte waqt same type lagana zaroori hai?
Answer:
Haan.
Q47. Kya Normal diode ki jagah Schottky diode laga sakte hain?
Answer:
Har jagah nahi. Circuit design ke mutabiq hi replacement karni chahiye.
Q48. Diode ko board se nikalne ke baad kya check karna chahiye?
Answer:
- Rail short hai ya nahi
- Naya diode lagane se pehle fault clear hua ya nahi
Q49. Shop Technician ke liye diode ki sab se important baat kya hai?
Answer:
Har short diode ko foran replace mat karo. Pehle yeh confirm karo ke diode khud faulty hai ya kisi aur component ki wajah se line short hui hai.
Q50. Interview Question
Question:
Laptop adapter lagate hi current limit par chala jata hai. Diode short milta hai. Kya sirf diode replace kar dena chahiye?
Answer:
Nahi. Pehle poori power rail check karo. Ho sakta hai diode sirf protection ke taur par short hua ho aur asal fault MOSFET, Charger IC ya kisi shorted capacitor mein ho. Agar root cause door kiye baghair diode replace kar diya to naya diode bhi dobara short ho sakta hai.
📌 Next Chapter
Chapter 4 – MOSFET (Q)
Yeh bohat important chapter hoga. Is mein 60 professional questions + answers honge, jin mein:
- N-Channel vs P-Channel
- Gate, Drain, Source
- Body Diode
- High Side / Low Side MOSFET
- Buck Converter
- Charger MOSFET
- CPU VCORE MOSFET
- Multimeter Testing
- Shop-level Fault Finding
- Real motherboard troubleshooting
Yeh chapter kisi professional laptop motherboard technician ke liye sab se important chapters mein se ek hoga.
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