An electric pottery wheel transfers 96 kJ of energy during the first 5.0 min after it is switched on.
During the first 30 s, the wheel transfers 15 kJ of energy as it reaches its operating speed. After this, the wheel operates at constant power.
A technician claims that the wheel will transfer at least 240 kJ of energy during the next 12 min of operation.
Calculate the power of the wheel after it reaches its operating speed.
Use your answer to part (a) to evaluate the technician's claim.
105 exam-style questions on Edexcel GCSE Physics 10.3 Electrical energy and power, covering 10.3.1 The heating effect of an electric current, 10.3.2 Reducing energy transfer in wires, 10.3.3 Advantages and disadvantages of the heating effect, 10.3.4 Energy transferred by an electrical circuit, 10.3.5 Electrical power, and 10.3.6 Energy transfers in domestic devices. Each one has a worked solution and a mark scheme showing where the marks go.