Two solar power plants supply electrical energy to a regional grid in different ways.
Solar plant A supplies energy directly to the grid. For every 1000 kJ of solar energy incident on the panels, 220 kJ is transferred to the grid as electrical energy.
Solar plant B stores electrical energy in a large battery storage facility and then supplies energy from the batteries to the grid. For every 1000 kJ of solar energy incident on the panels, 150 kJ is transferred to the grid as electrical energy.
Which statement about the two solar plants is correct?
Solar plant A is more reliable and more efficient than solar plant B.
Solar plant A is more reliable but less efficient than solar plant B.
Solar plant A is less reliable and less efficient than solar plant B.
Solar plant A is less reliable but more efficient than solar plant B.
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.