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Physics for IGCSE & O level - Forces And Energy (Section 8)

1
What does an engine do?
Answer
(A)
It transfers energy from one form to another.
2
Which of these is NOT a consequence of burning fossil fuels?
Answer
(D)
Increase oxygen levels
3
Which of the following increases the kinetic energy of a moving object?
Answer
(A)
Increasing its mass.
4
What happens to potential energy when an object falls?
Answer
(B)
It decreases.
5
What do solar panels directly convert?
Answer
(C)
Light energy into electricity
6
Which of the following describes a disadvantage of hydropower?
Answer
(B)
Often leads to flooding of land
7
Which of the following is NOT explicitly mentioned as a 'Pollution Problem'?
Answer
(D)
Using solar energy
8
What is the main job of the generator in a power station?
Answer
(B)
To convert mechanical energy into electrical energy
9
What is a potential drawback of hydroelectric power?
Answer
(B)
They can lead to flooding
10
What is the main fuel source used for the operation of a nuclear power station?
Answer
(C)
Uranium
11
What are some of the potential advantages of renewable energy resources?
Answer
A
B
12
Which factor is used to calculate gravitational potential energy?
Answer
(A)
Mass, gravity, and height
13
What do wind turbines convert into electricity?
Answer
(B)
Wind energy
14
What is the main goal of using renewable energy sources?
Answer
(A)
To decrease environmental damage
15
What happens when a moving object slows down?
Answer
(A)
Its kinetic energy decreases.
16
What are the main components of the global energy supply?
Answer
A
B
C
D
17
What is the formula for gravitational potential energy (PE)?
Answer
(A)
PE = mgh
18
Which of the following sources are considered as renewable?
Answer
A
C
D
19
What type of energy does a solar panel directly convert?
Answer
(C)
Light to electricity
20
What is the unit of power?
Answer
(C)
Watt (W)
21
How is electrical energy produced from thermal energy?
Answer
(D)
By using a generator
22
In a thermal power station, where does the thermal energy come from?
Answer
(C)
Burning fossil fuels or nuclear fission
23
Which of the following is NOT a renewable energy resource discussed?
Answer
(C)
Nuclear energy
24
What are some of the disadvantages of the use of solar energy?
Answer
A
C
D
25
What is the energy used to boil water at a thermal power station?
Answer
(B)
Thermal Energy
26
What is the primary source of energy in a nuclear power station?
Answer
(C)
Nuclear fission
27
Which one is not a type of renewable energy?
Answer
(C)
Nuclear
28
If an object is not moving and at rest, what type of energy does it possess?
Answer
(B)
Potential Energy
29
How is the gravitational potential energy of an object affected if its height above the ground is doubled?
Answer
(A)
It doubles.
30
What is the process of extracting shale gas called?
Answer
(C)
Fracking
31
What is the main benefit of using renewable energy sources?
Answer
(B)
They don't release greenhouse gases.
32
What is one of the main environmental disadvantages of using coal?
Answer
(A)
It causes air pollution
33
What unit measures the amount of energy?
Answer
(C)
Joule
34
What are some environmental concerns linked to nuclear power?
Answer
A
C
35
What are the main materials to produce solar panels?
Answer
(A)
Silicon
36
What is the purpose of a turbine in a power station?
Answer
(B)
To convert thermal energy to mechanical energy
37
What does 'g' represent in the PE formula?
Answer
(A)
Gravity
38
What type of energy is derived from the Earth's internal heat?
Answer
(C)
Geothermal energy
39
What is a key problem associated with the use of fossil fuels?
Answer
(C)
They contribute to air pollution.
40
Which type of energy is converted into electrical energy by a generator?
Answer
(B)
Mechanical energy
41
What is the term for the transfer of energy due to a force causing an object to move?
Answer
(B)
Work
42
What is a common environmental impact of using fossil fuels?
Answer
(A)
Release of greenhouse gases
43
What does the term "fracking" refer to in energy production?
Answer
(B)
Extracting natural gas
44
What type of energy is used to operate a wind turbine?
Answer
(C)
Wind energy
45
What is the formula to calculate gravitational potential energy?
Answer
(C)
PE = mgh
46
How is the efficiency of a power station improved?
Answer
(C)
By reducing energy waste
47
In a power station diagram, what does the generator do?
Answer
(A)
Convert energy from steam to electricity
48
What type of energy source is shale gas?
Answer
(B)
Non-renewable
49
Which of the following is a benefit of solar power?
Answer
(C)
Produces no pollution
50
What is the main purpose of using renewable energy sources?
Answer
(B)
To decrease environmental damage