Three cells each with an emf of 2,5 V and an internal resistance of 0,2 ohms are connected in series and across 15 ohms
Total emf = 2.5+2.5+2.5=7.5 volt
Total resistance of cells =0.2+0.2+0.2=0.6 ohm
Total resistance of circuit= 15+.6=15.6 ohm
Current in circuit=7.5/15.6=0.48 A
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