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  • Find the value of the internal resistance r circuit below if  E = 10 V and the potential drop across R = 9 <img alt="\Omega" src="https://entrancecorner.oncodecogs.com/gif.latex

Find the value of the internal resistance r circuit below if  E = 10 V and the potential drop across R = 9 \Omega

Option: 1

R/9


 


Option: 2

R/10


Option: 3

R/11 

 


Option: 4

9R


Answers (1)

best_answer

If V is the potential difference between A and B then 

\\r=\left ( \frac{E}{V} -1\right )R\\*\\ r=\frac{R}{9}

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