Five identical cells each of internal resistance 1 Ω and emf 5 V are connected in series and in parallel with an external resistance R . For what value of R , current in series and parallel combinatio

Question

Five identical cells each of internal resistance 1 Ω and emf 5 V are connected in series and in parallel with an external resistance R . For what value of R , current in series and parallel combination will remain the same?

TestHub · Accepted Answer

i 1 = 5 ε R + 5 r . . . 1 I 2 = ε R + r 5 . . . 2 From equation 1 and 2 i 1 = i 2 5 ε R + 5 r = ε R + r 5 ⇒ R = r = 1 Ω

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