An industrial electric arc furnace has a power rating of 15 MW15\text{ MW}15 MW. It operates at full capacity for 40 minutes40\text{ minutes}40 minutes to melt a batch of recycled steel. The commercial electricity rate is 18 pence18\text{ pence}18 pence per kWh\text{kWh}kWh.
How much does the electricity cost to run the furnace for this operation?
£1.80£1.80£1.80
£1,800£1,800£1,800
£6,480£6,480£6,480
£108,000£108,000£108,000
13 exam-style questions on OCR A A Level Physics Work, energy and power, covering Work and conservation of energy, Kinetic and potential energies, and Power. Each one has a worked solution and a mark scheme showing where the marks go.