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

Potential difference and power — practice question

As illustrated, a battery is connected to three resistors with resistances $12\,\Omega$, $6\,\Omega$ and $2\,\Omega$. The current supplied by the battery is $3\,\text{A}$. What is the value of the ratio $\dfrac{\text{power dissipated in the resistor of resistance } 6\,\Omega}{\text{power dissipated in the resistor of resistance } 2\,\Omega}$?

  • A$\dfrac{1}{3}$
  • B$\dfrac{4}{3}$
  • C$\dfrac{2}{1}$
  • D$\dfrac{3}{1}$

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