Physics for IGCSE & O level - Forces And Energy (Section 2)
1
Which of the following is an example of the conversion of potential energy to kinetic energy?
پاسخ دهید(C)
A ball rolling down a hill
2
What are the disadvantages of generating energy using wind turbines?
3
What problem could using biofuels have?
پاسخ دهید(B)
Can lead to deforestation
4
What happens to energy when you spend it?
پاسخ دهید(C)
It transforms into other forms of energy.
5
What are the environmental problems with hydroelectric power?
6
Which of the following has a positive impact on the environment?
7
What are the benefits of nuclear energy?
8
What is an advantage of the Pumped storage scheme?
9
What is the energy transformation in a solar panel?
10
What is the main role of a generator in power production?
11
Which of the following is an advantage of using renewable energy resources?
پاسخ دهید(C)
Reduced environmental impact
12
Which energy is released when fossil fuels are burned?
13
What does the phrase "global warming" refer to?
پاسخ دهید(B)
An increase in the average temperature of Earth
14
What is the main source of air pollution from burning fuels?
15
Which of the following factors can affect the efficiency of a machine?
16
Which energy source is considered a renewable energy source?
17
What does the term 'non-renewable resource' refer to?
پاسخ دهید(B)
Resources that are not replenished
18
What does the efficiency of a motor indicate?
پاسخ دهید(C)
How much useful energy the motor produces compared to the energy it consumes
19
Which of the following affects the amount of gravitational potential energy an object has?
20
Which of these best describes a key challenge when using renewable energy sources?
پاسخ دهید(B)
Their availability can be inconsistent.
21
What is the rate at which work is done called?
22
What is the SI unit for energy?
23
What does the term "power" represent?
پاسخ دهید(B)
The rate at which work is done
24
What happens to the energy from a fast moving object if the object is brought to a stop?
پاسخ دهید(B)
The energy is converted to heat and sound energy.
25
What is the definition of work done in physics?
پاسخ دهید(A)
Force applied over a distance.
26
What form of energy can be stored as potential energy?
27
What type of energy is stored in a stretched or compressed object?
28
Which of the following scenarios exemplifies work being done?
29
What is the main source for energy from the sun?
30
What is the environmental impact of using biofuels?
پاسخ دهید(C)
They reduce carbon emissions
31
Which of the following best describes a pumped storage scheme?
پاسخ دهید(B)
Storing water in a reservoir to be released later.
32
What gases are produced by burning fossil fuels?
33
What are the two main inputs for calculating efficiency?
پاسخ دهید(C)
Total energy input and useful energy output
34
Which of the following is an example of a non-renewable energy source?
35
What happens to the unused energy in a machine?
پاسخ دهید(C)
It is converted to heat (usually)
36
In a thermal power plant, what is the role of the cooling towers?
37
What element is primarily involved in the process of 'burning'?
38
Which of the following has the least impact on the environment?
39
In a car engine, which energy transformation takes place?
40
What is the formula for calculating gravitational potential energy?
41
In a power plant, what is primarily used to turn the turbines?
42
What energy is stored in batteries?
43
What are the units used for the calculation of gravitational potential energy (PE = mgh)?
44
Which of the following is primarily used to cool steam after it passes through the turbines in a thermal power plant?
45
Which of the following sources has high safety standards?
46
What is the primary source of energy input for most thermal power stations?
47
What is the main reason for the growing interest in renewable energy sources?
پاسخ دهید(D)
To reduce greenhouse gas emissions
48
What are some of the problems with using shale gas?
49
What is the unit of work and energy?
50
What does it mean to say 'work is done'?
پاسخ دهید(C)
Force has caused something to move.
