Question 15
FThe Figure shows a Sankey diagram for an electric kettle.
Figure
a.[1]
Determine the energy that the width of one square represents.
b.[2]
Calculate the energy usefully transferred to the thermal store of the water.
c.[2]
Explain how the Sankey diagram shows that energy is conserved.
d.[2]
Give the energy transfer pathway
-
from the mains supply to the kettle
-
from the heating element to the water.
e.[2]
A different kettle transfers the same amount of energy to the thermal store of the water.
This kettle wastes a total of 60 J.
Calculate the total energy supplied to this kettle.
8.1 Energy transfers and work Questions
115 exam-style questions on Edexcel GCSE Physics 8.1 Energy transfers and work, covering 8.1.1 Energy stores and transfer diagrams, 8.1.2 Ways of changing a system's energy, and 8.1.3 Work done by forces. Each one has a worked solution and a mark scheme showing where the marks go.