Physics 9702 · AS & A Level · Resistance and resistivity

Resistance and resistivity — practice question

Which equation is used to express resistance?

  • A$\text{energy} = (\text{current})^2 \times \text{resistance} \times \text{time}$
  • B$\text{potential difference} = \text{current} \times \text{resistance}$
  • C$\text{power} = (\text{current})^2 \times \text{resistance}$
  • D$\text{resistivity} = \text{resistance} \times \text{area} \div \text{length}$

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