A domestic solar photovoltaic array has an efficiency of 18%. During a clear afternoon, the array generates 4.05×107 J4.05 \times 10^7\text{ J}4.05×107 J of useful electrical energy.
Calculate the total solar energy incident on the array during this period.
38 exam-style questions on Edexcel GCSE Physics 3.2 Dissipation and efficiency. Each one has a worked solution and a mark scheme showing where the marks go.