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

Potential difference and power — practice question

A cell with negligible internal resistance is joined to resistors $R_1$, $R_2$ and $R_3$, as illustrated. The cell supplies energy to the circuit and energy is lost in the resistors. Which word equation has to be correct?

  • Apower dissipated in $R_1$ = power dissipated in $R_2$ + power dissipated in $R_3$
  • Bpower dissipated in $R_2$ = power dissipated in $R_3$
  • Cpower output of cell = power dissipated in $R_1$ + power dissipated in $R_2$ + power dissipated in $R_3$
  • Dpower output of cell = power dissipated in $R_1$

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