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Physics for IGCSE & O level - Forces And Energy (Section 1)

1
What is an advantage of using wind energy?
Answer
A
B
C
2
What is work done?
Answer
(A)
Force x distance
3
What type of energy is involved in the process called 'nuclear fission'?
Answer
(C)
Nuclear energy
4
What is the main purpose of the generator in a power plant?
Answer
(B)
To produce electricity.
5
What is a problem with wind energy?
Answer
(A)
It is only available in certain areas
6
Which type of energy is stored in the fuel used in a power plant?
Answer
(B)
Chemical energy
7
What is the process by which steam turns a turbine?
Answer
(B)
Rotation
8
In a thermal power station, what is the main function of the boiler?
Answer
(B)
To turn water into steam.
9
Which of the following are a potential disadvantage of wind energy?
Answer
A
B
C
10
If an engine uses 100 J of energy and produces 80 J of useful work, what is its efficiency?
Answer
(B)
80%
11
What is the unit of power?
Answer
(B)
Watt
12
What is the unit for measuring energy?
Answer
(B)
Joule (J)
13
Which of the following are considered energy resources?
Answer
A
B
C
D
14
What is a problem with using nuclear energy?
Answer
(C)
It has a high risk of an accident
15
What type of energy powers wind turbines?
Answer
(B)
Wind energy
16
What do the turbines do?
Answer
(D)
Spin due to the force of the steam.
17
In the formula, efficiency = (useful power output) / (total power input), which is the correct format?
Answer
(B)
Total power input should be greater than useful power output.
18
Which statement accurately describes the law of conservation of energy?
Answer
(C)
Energy cannot be created or destroyed, only changed in form.
19
What are the two main types of renewable energy resources?
Answer
(A)
Wind energy and Solar energy
20
What type of energy is associated with the movement of electrons?
Answer
(B)
Electrical
21
Which of the following are sources of renewable energy?
Answer
A
B
C
22
What factors are used to calculate the work done?
Answer
A
B
23
What type of energy is associated with the movement of an object?
Answer
(B)
Kinetic energy
24
How can we reduce the amount of CO2 in the atmosphere?
Answer
(B)
Using renewable sources
25
Which of the following best describes the relationship between work and energy?
Answer
(B)
Work is the transfer of energy.
26
What are the units of measurement for work?
Answer
(B)
Joules
27
What type of energy does a moving object possess?
Answer
(B)
Kinetic energy
28
What type of energy is released during the burning of fuel?
Answer
(D)
Thermal energy
29
In a car engine, what is the fuel's main purpose?
Answer
(B)
To provide energy
30
How does the efficiency of a machine relate to energy waste?
Answer
(B)
Higher efficiency, less waste
31
What is gravitational potential energy?
Answer
(B)
The energy stored by an object due to its position above the ground.
32
What is the primary source of energy for the Earth?
Answer
(B)
The Sun
33
What type of energy is associated with vibrating atoms or molecules?
Answer
(B)
Thermal
34
Which of the following describes the work done on an object?
Answer
(C)
The force applied to the object multiplied by the distance the object moves in the direction of the force.
35
What are the major issues that arise with the use of fossil fuels?
Answer
A
B
D
36
What can reduce the damage to the environment?
Answer
(C)
Making better use of renewable energy sources
37
Which of the following is a renewable energy resource?
Answer
(C)
Solar
38
What are the two main components of thermal power stations?
Answer
(A)
boiler and turbine
39
What is the efficiency of a machine?
Answer
(C)
The useful energy output divided by the total energy input, multiplied by 100.
40
Which of the following are correct about the units of measurement?
Answer
A
B
41
What is produced during combustion?
Answer
(C)
Both
42
What type of energy does a hydroelectric power station utilize?
Answer
(C)
Kinetic energy of water
43
What is the primary pollutant associated with the burning of fossil fuels?
Answer
(B)
Carbon dioxide
44
What unit is efficiency measured in?
Answer
(C)
Percentage
45
What is the primary environmental concern associated with nuclear power?
Answer
(C)
Disposal of radioactive waste
46
What is the unit for measuring force?
Answer
(C)
Newton (N)
47
What are the possible environmental drawbacks of hydroelectric dams?
Answer
A
B
C
48
What is the main purpose of a turbine in a power plant?
Answer
(B)
To convert thermal energy into kinetic energy.
49
What are the main products of a nuclear reaction?
Answer
(A)
Energy and radioactive waste
50
What is the energy of an object with a mass of 2 kg and a velocity of 3 m/s?
Answer
(B)
9 J