Physics 9702 · AS & A Level · Resistance and resistivity

Resistance and resistivity — practice question

The resistance of a metal cube is determined by placing it between two parallel plates, as illustrated. The cube has volume $V$ and is formed from a material of resistivity $\rho$. The connections to the cube have negligible resistance. Which expression gives the electrical resistance of the metal cube between X and Y?

  • A$\rho V^{\frac{1}{3}}$
  • B$\rho V^{\frac{2}{3}}$
  • C$\dfrac{\rho}{V^{\frac{1}{3}}}$
  • D$\dfrac{\rho}{V^{\frac{2}{3}}}$

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