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A group of N cells whose emf varies directly with the internal resistance as per the equation EN = 1.5 rN are connected as shown

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A group of N cells whose emf varies directly with the internal resistance as per the equation EN = 1.5 rN are connected as shown in the figure below. The current I in the circuit is

(1)  0.51 amp

(2)  5.1 amp

(3)  0.15 amp

(4) 1.5 amp

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Correct option (4)   1.5 amp 

Explanation:

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