Question 16
FA battery-operated fan is switched on. The fan runs at a constant speed.
The Figure shows an energy transfer diagram for the fan.
Figure
a.[1]
Give the name of the energy transfer pathway P.
b.[1]
Box Q shows where the wasted energy ends up.
Give the energy store Q.
c.[2]
In 10 seconds, 450 J of energy is transferred from the chemical store of the battery.
270 J of this energy is transferred to the kinetic store of the moving air.
Calculate the energy transferred to store Q in this time.
d.[2]
The battery, the fan and the air in the room form a closed system.
Explain what happens to the total energy of this closed system while the fan is running.
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.