An array of solar cells is used to generate carbon-free electrical energy.
State the main form of energy transferred from the Sun to the solar cells for the generation of electrical energy.
Consider the generation of electrical energy by a large number of solar cells.
State one environmental advantage and one environmental disadvantage of using solar cells to generate electricity.
State and explain whether solar energy is a renewable source of energy.
Each group of solar cells is arranged in a rectangle of dimensions 2.0 m×1.2 m2.0\text{ m} \times 1.2\text{ m}2.0 m×1.2 m. The solar cells are situated in a region where they receive 400 W400\text{ W}400 W of solar radiation per square metre. The electrical output of each group of solar cells is a current of 3.0 A3.0\text{ A}3.0 A at a potential difference of 64 V64\text{ V}64 V.
Calculate the efficiency of the solar cells.
142 exam-style questions on CIE IGCSE Physics 1.7.3 Energy resources. Each one has a worked solution and a mark scheme showing where the marks go.