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10 वोल्ट विधुत वाहक बल वाली बैटरी जिसका आंतरिक प्रतिरोध `3 Omega` है , किसी प्रतिरोधक से संयोजित है । यदि परिपथ में धारा का मान `0.5` ऐम्पियर हो , तो प्रतिरोधक का प्रतिरोध क्या है ? जब परिपथ बंद है , तो सेल की टर्मिनल वोल्टता क्या होगी ?

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दिया है : E = 10 वोल्ट , `r = 3 Omega, I = 0.5 A`
दिया है : E = 10 वोल्ट , `R Omega` है , तब परिपथ का कुल प्रतिरोध
`R + r = E/I = 10/(0.5) = 20 Omega`
`:. ` प्रतिरोधक का प्रतिरोध , ` R = 20 - r = 20 - 3 = 17 Omega`
सेल की टर्मिनल वोल्टता , `V = i R = 0.5 xx 17 = 8.5` वोल्ट

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