An electric kettle has a power of 2200 W. The kettle is used to bring water to the boil.
Complete the sentence. A power of 2200 W means that the kettle transfers ______ joules of energy each second.
The kettle is switched on for 90 s. Calculate the energy transferred by the kettle in this time.
Describe the energy transfers that take place when the kettle brings the water to the boil.
After 90 s the water has not reached 100 ∘C100\ ^\circ\text{C}100 ∘C. Suggest one reason why.
40 exam-style questions on AQA GCSE Physics 1.1 Energy changes in a system, and the ways energy is stored before and after such changes, covering 1.1.1 Energy stores and systems, 1.1.2 Changes in energy, 1.1.3 Energy changes in systems, and 1.1.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.