An aquaculture breeding tank is heated using a submerged ceramic resistance heater. When operating at full capacity, the current in the heating element is 7.5 A and the heater has a power output of 1.6 kW.
Calculate the electrical resistance of the ceramic heating element.
Give your answer to two significant figures.
31 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.