A soldering iron is plugged into the mains and switched on so that it can melt solder. It has a metal tip, a handle and a power cable.
Which energy store does the soldering iron fill usefully as it operates?
the thermal store of the handle
the thermal store of the surroundings
the thermal store of the power cable
the thermal store of the metal tip
105 exam-style questions on Edexcel GCSE Physics 10.3 Electrical energy and power, covering 10.3.1 The heating effect of an electric current, 10.3.2 Reducing energy transfer in wires, 10.3.3 Advantages and disadvantages of the heating effect, 10.3.4 Energy transferred by an electrical circuit, 10.3.5 Electrical power, and 10.3.6 Energy transfers in domestic devices. Each one has a worked solution and a mark scheme showing where the marks go.