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

Potential difference and power — practice question

The diagrams illustrate two different circuits. In each circuit, the cells have the same electromotive force and zero internal resistance. Each of the three resistors has resistance $R$. In the circuit on the left, the power dissipated in the resistor is $P$. What is the total power dissipated in the circuit on the right?

  • A$\frac{P}{4}$
  • B$\frac{P}{2}$
  • C$P$
  • D$2P$

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