Physics 9702 · AS & A Level · Practical circuits

Practical circuits — practice question

A car battery has an internal resistance of $0.10\,\Omega$ and an electromotive force of $12\,\text{V}$. Once the battery is linked to the starter motor, the potential difference between the battery terminals is $7.0\,\text{V}$. What is the current supplied to the starter motor?

  • A$50\,\text{A}$
  • B$70\,\text{A}$
  • C$120\,\text{A}$
  • D$190\,\text{A}$

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