The charge for electrical energy is $\$0.25$ for every unit of $1\,\text{kW h}$. A $2200\,\text{W}$ heater is turned on for $48$ minutes. What is the cost of using it?
- A$\$0.44$
- B$\$0.55$
- C$\$26$
- D$\$440$
Physics 0625 · IGCSE · Energy, work and power