Question 38
FAn electric kettle is used to bring some water to the boil.
The Figure is an incomplete energy transfer diagram for the kettle for each second it is switched on.
Figure
a.[1]
Determine the energy transferred to the thermal energy store of the surroundings each second.
b.[2]
Explain how the energy transfer diagram shows that energy is conserved.
c.[2]
The kettle is switched on for 150 s.
Calculate the total energy transferred to the thermal energy store of the water in this time.
d.[2]
A student says that the energy transferred to the surroundings has been destroyed.
Explain why the student is wrong.
3.1 Energy stores and calculations Questions
121 exam-style questions on Edexcel GCSE Physics 3.1 Energy stores and calculations, covering 3.1.1 Gravitational potential energy, 3.1.2 Kinetic energy, and 3.1.3 Energy transfers and conservation of energy. Each one has a worked solution and a mark scheme showing where the marks go.