Font size
WorksheetsPhysics - Energy - Triple
Total questions: 26
Worksheet time: 26mins
State the type of energy stored in a battery.
(a)
The energy transfer for a car engine is
chemical -> kinetic + thermal + sound
What is the useful energy?
chemical
kinetic
thermal
sound
The energy transfer for a kettle boiling water is
electrical -> thermal + sound
What is the wasted energy?
chemical
thermal
sound
Complete the energy transfer for a microphone
(a) -> electrical + thermal
(a) is the energy stored by moving objects.
In a closed system the amount of energy remains constant.
True
False
State the Law of Conservation of Energy.
An open system is...
an object with a hole in it.
an object which gains or loses energy.
an object which does not let energy in or out.
an object that is outside.
What is the value of the wasted energy?
(a)
What type of energy is useful in this diagram?
(a)
Which bulb is the most efficient?
Filament bulb
LED light
CFL lamp
A device transfers 600 J of electrical energy into 350 J of useful sound energy. Calculate the efficiency of the device to 2 significant figures.
(a)
A light bulb is 70% efficient. It produces 49 J of light energy. How much energy is inputted?
(a)
Which colours is the best absorber of heat?
white
red
blue
black
Which colours is the best emitter of heat?
white
red
blue
black
What is the main method of heat transfer through a solid?
Conduction
Convection
Radiation
Insulators, such as air, have a ___ thermal conductivity.
high
low
A lubricant is used to reduce heat loss by reducing (a) between moving parts.
When wasted energy is transferred to the surroundings we say it is...
dissolved
disappeared
dissipated
destroyed
If a bulb is 65% efficient, it wastes (a) % of its energy.
In a Sankey diagram, wasted energy points...
to the left
to the right
up
down
Select the non-renewable energy resources.
Coal
Wind
Hydroelectric
Nuclear
Geothermal
Select the renewable energy resources.
Oil
Wind
Hydroelectric
Tidal
Solar
Select the fossil fuels.
Coal
Biomass
Nuclear
Natural gas
Oil
Which of these is NOT an advantage of nuclear power.
It does not produce carbon dioxide.
It is renewable.
It is very efficient.
It is reliable.
Which of these are advantages of hydroelectric power?
It does not produce carbon dioxide.
It is renewable.
It is cheap.
It is reliable.
