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A group of N cells such its emf EN = 1.5rN is shown in the diagram below. What is the current I in the circuit?

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A group of N cells such its emf E<sub>N</sub> = 1.5r<sub>N</sub> is shown in the diagram below. What is the current I in the circuit?<br /><img src='https://www.fatskills.com/class12science/physics-exam-questions-schools-q9.png' width='300' height='306' />






 
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