Physics 9702 · AS & A Level · Electric current

Electric current — practice question

The amount of charge a fully charged $12\,\text{V}$ car battery can provide is $100\,\text{kC}$. The starter motor of the car needs a current of $200\,\text{A}$ for an average time of $2.0\,\text{s}$. A fault means the battery does not recharge. What is the greatest number of times the starter motor of the car can be operated?

  • A21
  • B25
  • C42
  • D250

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