Physics 9702 · AS & A Level · Resistance and resistivity

Resistance and resistivity — practice question

Two resistors with resistances $R_1$ and $R_2$ are joined in parallel. What is the total resistance between X and Y?

  • A$R_1 + R_2$
  • B$\frac{R_1 R_2}{R_1 + R_2}$
  • C$\frac{R_1 + R_2}{R_1 R_2}$
  • D$\frac{R_1}{R_2}$

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