Electronics ki duniya mein Resistor (प्रतिरोधक) sabse basic lekin sabse mahatvapoorn component hai. Chahe aap ek student hon ya electronics hobbyist, aapko ye pata hona chahiye ki kisi resistor ki value kaise nikaali jati hai aur wo sahi kaam kar raha hai ya nahi.
Aaj ke is article mein hum do sabse popular tareekon ke baare mein baat karenge: Color Code Method aur Digital Multimeter Method.
1. Resistor Color Code Table se Value Nikalna
Resistors bahut chote hote hain, isliye unpar value likhna mushkil hota hai. Isliye companies unpar alag-alag rang ki strips (bands) banati hain. Is method ko “Reading” kehte hain.
Bands ko Pehchanne ka Sahi Tarika
- Zyadatar resistors mein 4 bands hote hain.
- Resistor ko hamesha aise pakdein ki Gold ya Silver band aapke right side (daayein hath) par ho.
- Pehli do bands ‘Digits’ hoti hain, teesri ‘Multiplier’ aur chauthi ‘Tolerance’.
Color Code Chart (BB ROY Method)
Ise yaad rakhne ka formula hai: “B B ROY of Great Britain had a Very Good Wife”.
| Color | Digit | Multiplier | Tolerance |
|---|---|---|---|
| Black | 0 | 1 | – |
| Brown | 1 | 10 | ±1% |
| Red | 2 | 100 | ±2% |
| Orange | 3 | 1,000 (1k) | – |
| Yellow | 4 | 10,000 (10k) | – |
| Gold | – | 0.1 | ±5% |
| Silver | – | 0.01 | ±10% |
Example: Maan lijiye aapke resistor par Brown, Black, Red aur Gold bands hain.
1. Brown = 1
2. Black = 0 (Toh ye ban gaya 10)
3. Red = x100 (Multiplier)
Total Value: 10 x 100 = 1000 Ohms yaani 1kΩ.
Capacitor Kharab Hai Ya Nahi Kaise Check Kare? (Complete Guide)
2. Multimeter se Resistor kaise Check karein?
Kabhi-kabhi resistor purana hone ki wajah se uske colors dhundhle ho jate hain. Aise mein Digital Multimeter (DMM) sabse best solution hai.
Step-by-Step Process:
- Selector Dial Set Karein: Apne multimeter ko Ohm (Ω) wale section par set karein. Agar aapko value nahi pata, toh sabse badi range (jaise 2MΩ) se shuru karein.
- Probes Connect Karein: Black probe ko ‘COM’ mein aur Red probe ko ‘VΩ’ port mein lagayein.
- Measure Karein: Resistor ke dono ends par probes ko lagayein. Isme polarity (plus-minus) ki chinta karne ki zarurat nahi hoti.
- Reading Adjust Karein: Agar display par ‘0.00’ dikh raha hai, toh dial ko niche ki range par layein jab tak clear reading na mil jaye.
Important Tip: Resistor ko hamesha circuit se nikaal kar check karein. Agar wo board par laga hoga, toh circuit ke baaki components reading ko galat kar sakte hain.
3. Kaise Pata Karein Resistor Kharab Hai?
Agar aapne multimeter se check kiya aur niche di gayi cheezein ho rahi hain, toh resistor faulty ho sakta hai:
- Open Resistor: Agar multimeter ‘OL’ (Overload) ya ‘1’ dikhata hai har range par, toh resistor andar se toot gaya hai.
- Value Drift: Agar color code ke hisaab se 1kΩ hona chahiye lekin multimeter 2kΩ dikha raha hai, toh wo kharab ho chuka hai.
- Burn Marks: Agar resistor par kaale nishaan hain, toh wo overheat hokar jal chuka hai.