Physics 9702 · AS & A Level · Potential difference and power

Potential difference and power — practice question

A component in a circuit has a potential difference of $2.0\,\text{V}$ across it. How many electrons must pass through the component for $4.8\,\text{J}$ of energy to be transferred to it?

  • A$2.6 \times 10^{18}$
  • B$1.5 \times 10^{19}$
  • C$3.0 \times 10^{19}$
  • D$6.0 \times 10^{19}$

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