A solar-powered weather station has components powered by a rechargeable battery linked to a solar panel.
Name the energy store in the battery.
The main processor and the wireless transmitter in the weather station are connected in parallel. State one advantage of this parallel connection.
Under conditions of peak sunlight, the efficiency of the solar panel is 16%16\%16%. The useful power output supplied by the solar panel is 12 W12\text{ W}12 W.
State what is meant by 16%16\%16% efficiency.
Under conditions of peak sunlight, the efficiency of the solar panel is 16%16\%16%. The useful power output supplied by the solar panel is 12 W12\text{ W}12 W.
Calculate the solar power input to the solar panel.
Suggest two advantages of using a solar panel to power this remote weather station instead of connecting it to the mains electricity grid.
533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.