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WorksheetsIB Physics Subtopic 8.1 Energy Sources
Total questions: 28
Worksheet time: 43mins
Name
Class
Date
1.
The unit of energy density of a fuel is
a)
J m–2.
b)
J m–3.
c)
J kg–1.
d)
kg J–1.
2.
Which of the following is the best estimate for the overall efficiency of a typical coal power station?
a)
5%
b)
30%
c)
60%
d)
90%
3.
The efficiency of a modern natural gas power station is approximately
a)
10%
b)
50%
c)
75%
d)
90%
4.
The rate of global warming might be reduced by
a)
replacing the use of coal and oil with natural gas.
b)
a reduction in the Earth’s albedo.
c)
a reduction in carbon fixation.
d)
an increase in deforestation.
5.
The Sankey diagram shows a typical fossil-fuel plant of total efficiency 40 %. There are frictional, electrical transmission and energy losses to the lower temperature surroundings. Which branch represents the electrical energy arriving at the customer?
a)
A
b)
B
c)
C
d)
D
6.
What is increased in a sample of uranium ore when nuclear fuel is enriched?
a)
A
b)
B
c)
C
d)
D
7.
In the production of electric power, an advantage of using photovoltaic cells rather than fossil fuels is that the photovoltaic cells
a)
can be effective in any location.
b)
can be used continuously.
c)
have low initial set-up costs.
d)
are more environmentally friendly when in use.
8.
What is the main role of the control rods and the main role of the moderator in a thermal fission reactor?
a)
A
b)
B
c)
C
d)
D
9.
An oscillating water column (OWC) ocean-wave energy converter uses waves to alter the air pressure in a chamber. Which energy resources must have been involved for this method to generate electricity?
I. Tides
II. Wind
III. Solar
I. Tides
II. Wind
III. Solar
a)
I only
b)
II only
c)
I and II only
d)
II and III only
10.
What is the correct order of energy transformations in a coal power station?
a)
thermal → chemical → kinetic → electrical
b)
chemical → thermal → kinetic → electrical
c)
chemical → kinetic → thermal → electrical
d)
kinetic → chemical → electrical → thermal
11.
A solar panel has surface area 0.40 m2 and efficiency 50%. The average intensity of radiation reaching the surface of the panel is 0.25 kWm–2. What is the average power output from an array of 10 of these solar panels?
a)
0.5 W
b)
5.0 W
c)
50 W
d)
500 W
12.
A wind turbine produces a power P when the wind speed is v. Assuming that the efficiency of the turbine is constant, the best estimate for the power produced when the wind speed becomes 2v is
a)
2P
b)
4P
c)
6P
d)
8P
13.
The design of a nuclear power station includes an electrical generator. The function of the generator is to convert
a)
A. nuclear energy to kinetic energy.
b)
B. kinetic energy to thermal energy.
c)
C. thermal energy to electrical energy.
d)
D. kinetic energy to electrical energy.
14.
Which of the following fuels has the highest energy density?
a)
A. Coal
b)
B. Gas
c)
C. Oil
d)
D. Uranium
15.
Which of the following correctly describes both the role of the moderator and of the control rods in a nuclear reactor?
a)
A
b)
B
c)
C
d)
D
16.
Coal, natural gas, and oil all produce energy. How?
a)
They are burned to produce heat
b)
Their weight causes a turbine to spin
c)
They undergo nuclear fission
d)
They power solar panels
17.
Water and wind can produce energy. How?
a)
They are burned to produce heat
b)
Their movement causes a turbine to spin
c)
They undergo nuclear fission
d)
They power solar panels
18.
Which device converts mechanical energy to electrical energy?
a)
Turbine
b)
Transformer
c)
Generator
d)
Solar Cell
19.
What is a renewable resource?
a)
a resource that is not used up or can be very quickly replenished
b)
a resource that can not be replenished within a human lifetime
20.
Which of the following is NOT a fossil fuel?
a)
coal
b)
natural gas
c)
oil
d)
biomass
21.
Is solar a renewable energy resource?
a)
Yes
b)
No
22.
Is nuclear a renewable energy resource?
a)
Yes
b)
No
23.
Is geothermal a renewable energy resource?
a)
Yes
b)
No
24.
Nuclear power comes from...
a)
Uranium
b)
Oxygen
c)
Nitrogen
d)
Hydrogen
25.
What natural resource do hydroelectric plants use?
a)
oil
b)
the sun
c)
coal
d)
water
26.
Fission, or the process of splitting an atom, quickly creates a large amount of ______________ energy
a)
Geothermal
b)
Biomass
c)
Nuclear
d)
Solar
27.
This fossil fuel is a black solid that is mined from the ground
a)
Coal
b)
Oil
c)
Natural Gas
28.
The majority of the energy on Earth comes from the sun, but small amounts come from ____.
a)
radioactive decay
b)
other stars
c)
methane from cow farts
d)
constant wind
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