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Electricity
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Consider a parallel circuit with 10 cells each in 5 rows with emf 1.5 volt and resistance 1 Ω, where there is an external resistance of 20 Ω. Calculate the current.
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A
0.68 amp
💡 Explanation:
Number of cells in a row n = 10
Number of such rows m = 5
i = nE/(R + nr/m) = 10 x 1.5/(20 + 10 x 1/5) = 15/22 = 0.68 amp