A 12 V car baltery dies nol so much because ils volage drops bul because chemica

Question

A 12 V car baltery dies nol so much because ils volage drops bul because chemical reactiens increage its internal resistance. A good battery connected with jumper cables can both start the engine and recharge the dead battery. Consider the automotive circuit of (Figure 1). Part A Haw much current could tha good hatery alona drive through the starter motar? Exprass your answer with the appropriate units. 0?? Value Units Subm Part B Haw much current is the dead battery alone abla to drive throuugh the starter motar? Express your answer with the appropriate units. Value Units Figure 1o11 Subm Request Answer Part C ith the jumper cables attached, how much current passes through the starter motor? Express your answer with the appropriate units. 0.01 ? 0.5012 0.05 ? 12 V 8 v Good battery Dend I-Value Units Sutbrni

Explanation / Answer

The current that the good battery alone could drive through the Starter Motor is 12/(0.05+0.01)= 12/0.06= 200A

The current that the dead battery alone is able to drive through the Starter Motor is 8/(0.05+0.5)= 8/0.55= 14.5A

With the jumper cables attached, both the good battery and the dead battery provide current to the Starter Motor, which is given by superposition, that is the current of both the batteries are added. So the current that passes through the Starter Motor is 200A+ 14.5A= 214.5A

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