When an electric kettle is connected to the mains power supply and switched on, energy is transferred from the mains supply to the thermal energy store of the heating element.
How is the energy transferred from the mains supply to the heating element in this process?
by electrical work
by electromagnetic waves
by heating
by mechanical work
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.