Physics for IGCSE & O level - Forces And Energy (Section 5)
1
If a machine has an efficiency of 80%, what does this mean?
Svar(A)
80% of the energy input is converted to useful energy
2
Which of the following is an example of energy storage?
4
In a thermal power station, which component uses the energy from steam?
5
What are the benefits of using renewable sources of energy?
6
What is the main function of the dam in a hydroelectric power plant?
7
Which energy resources can cause global warming?
8
How can you convert energy?
Svar(A)
You can transform it from one type to another
9
What is the formula for calculating work done?
10
If the work done is 20J and the distance moved is 4m, what is the force applied?
11
In the context of physics, what does work done represent?
Svar(C)
Energy transferred when a force causes displacement
12
What is the role of the fuel in a car engine?
13
Which energy sources are considered non-renewable?
14
What is a challenge in extracting shale gas?
Svar(B)
High pressure water is required
15
Which form of energy is stored in an object due to its height?
Svar(B)
Gravitational potential energy
16
Which of the following is an example of thermal energy?
17
In the equation for gravitational potential energy (PE = mgh), what does 'g' represent?
Svar(D)
Gravitational acceleration
18
What are examples of renewable sources?
19
What is one major problem with using coal as a fuel?
Svar(C)
It releases sulfur dioxide
20
What is the definition of power?
Svar(B)
Rate of doing work or transferring energy.
21
What are some forms of fossil fuels?
22
What process in the sun turns hydrogen to helium?
23
What does the word "harness" mean in the context of energy?
24
Which of the following is true about energy in a simple chain?
25
What do engines and motors transfer energy from?
26
What is a potential environmental problem associated with hydroelectric power schemes?
27
What type of waste is generated by a nuclear power station?
28
Which of the following is a potential problem associated with geothermal energy?
29
Which is a main source for biofuels?
30
What is the primary environmental concern related to the use of coal for energy?
31
What is a major problem associated with burning fossil fuels?
32
What is the source of energy used for tidal power?
33
What happens to the energy in a hydroelectric power station?
34
What type of energy is released during the falling of an apple?
35
What type of scheme generates hydroelectric power?
36
What is one of the main disadvantages of nuclear power stations?
Svar(C)
They generate radioactive waste
37
What type of energy is used for the rotating of turbines in a power station?
38
Which of these is a source of renewable energy?
39
How can you increase the kinetic energy of an object?
Svar(B)
Increase its mass or speed.
40
What is the main disadvantage of pumped storage schemes?
Svar(D)
They are expensive to build.
41
What is the name of the process where the nuclei of atoms are split to release energy?
43
What units is the change in energy measured in?
44
If you lift an object, how do you increase its potential energy?
45
In energy transfers, what is the term for the energy being transferred?
46
What is the term for the energy stored in a compressed spring?
47
What are the main environmental drawbacks of burning fossil fuels?
48
What type of energy is associated with harnessing the tides?
49
In the formula for PE, what does 'h' represent?
50
Which of the following is a renewable energy source?
