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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 $\Omega$

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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