The three resistors are connected in a circuit in the arrangement shown. The power dissipated in any resistor must not exceed $4.0\,\text{W}$. Determine the greatest voltage across XY.
- A$24\,\text{V}$
- B$30\,\text{V}$
- C$40\,\text{V}$
- D$60\,\text{V}$
Physics 9702 · AS & A Level · Potential difference and power