Physics 0625 · IGCSE · Electric circuits

Electric circuits — practice question

A resistor $R$ is arranged in parallel with an $8.0\,\Omega$ resistor. The combined resistance of the two is $4.0\,\Omega$. What resistance does resistor $R$ have?

  • A$0.50\,\Omega$
  • B$2.0\,\Omega$
  • C$4.0\,\Omega$
  • D$8.0\,\Omega$

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