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एक कार्बन प्रतिरोधक के क्रमश : लाल , हरा और नारंगी बैण्ड अंकित है प्रतिरोधक का उचित प्रतिरोध क्या होगा ?

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लाल रंग के संगत अंक 2 , हरा रंग के संगत अंक 5 तथा नारंगी रंग के संगत गुणांक `10^(3) ` है| चौथा रंग नहीं दिया है| अतः त्रुटि सिमा ` 20% ` होगी|
इस प्रकार दिए गए प्रतिरोधक का प्रतिरोध `25xx 10^(3)` ओम ` +- 20%` अर्थात `2.5xx 10^(4) ` ओम ` +- 20%` होगा|

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