A torch is powered by a battery. The torch is switched on.
Which statement describes how energy is transferred from the battery to the lamp?
Energy in the chemical store of the battery is transferred electrically
Energy in the kinetic store of the battery is transferred by heating
Energy in the thermal store of the battery is transferred by radiation
Energy in the nuclear store of the battery is transferred mechanically
50 exam-style questions on OCR GCSE Physics 7.2 Power and efficiency, covering 7.2.1 Dissipation of energy, 7.2.2 Energy transfers in domestic devices, 7.2.3 Power ratings of domestic appliances, 7.2.4 Efficiency of energy transfers, 7.2.5 Ways to increase efficiency, 7.2.6 Reducing unwanted energy transfers, and 7.2.7 Thermal conductivity and the cooling of buildings. Each one has a worked solution and a mark scheme showing where the marks go.