Physics for IGCSE & O level - The Earth In Space (Section 7)
1
Which scientist developed the theory of electromagnetism?
Risposta
(C)
James Clerk Maxwell
2
In which of the following situations could you benefit from eye protection?
Risposta
A
B
C
D
3
What is the correct procedure to ensure that a scale reading is accurate?
Risposta
(B)
Ensure the indicator is at eye level.
4
What is the definition of period of a pendulum?
Risposta
(B)
The time it takes to complete one swing
5
Why is it important to take multiple readings in an experiment?
Risposta
(B)
To find an average value
6
When designing a parachute, what is the correct thing to do?
Risposta
(B)
Change the material and size
7
If air is trapped in a sealed cylinder at a pressure of 200kPa, and the piston is pulled out slowly so that the air expands to three times its volume. What is the new pressure of the air?
Risposta
(A)
66.7 kPa
8
Who first suggested that the Earth might behave like a 'bar magnet'?
Risposta
(A)
William Gilbert
9
What does 10^10 mean?
Risposta
(C)
10,000,000,000
10
What is the relationship between thermal energy and internal energy?
Risposta
(B)
Thermal energy is a component of internal energy.
11
What did James Chadwick discover?
Risposta
(C)
The neutron
12
A car is traveling to the right. Which of the following statements must be true?
Risposta
(B)
X has double the resistance of Y.
13
What does the text describe as the tool used to measure angles?
Risposta
(B)
Protractor
14
Who proposed the concept of photons?
Risposta
(C)
Albert Einstein
15
What should be done to the power supply before making a circuit?
Risposta
(C)
Switched off
16
What is one way to safely work with a gas flame?
Risposta
(C)
Make sure there is a gauze on top before attempting to heat.
17
What safety measure should always be taken before starting any experiment involving electricity?
Risposta
(C)
Switch off the power supply.
18
What is important to include in a scientific report?
Risposta
(D)
All of the above
19
What are you supposed to do during a test?
Risposta
A
B
C
D
20
Which of the following energy resources does NOT have the Sun as its main source of energy?
Risposta
(A)
Geothermal
21
What is the main purpose of a shielding cage when working with high voltage?
Risposta
(B)
To protect people from the electrical hazard
22
What does 'follow instructions carefully' help prevent?
Risposta
(C)
Accidents
23
Which statement about resistance is correct?
Risposta
(B)
X has double the resistance of Y.
24
What is one of the key pieces of evidence supporting the expansion of the universe?
Risposta
(B)
The observation of redshift in the light from distant galaxies.
25
What is the current in the secondary coil? Assume that the transformer is 100% efficient.
Risposta
(B)
1.0 A
26
Which of the following is a key consideration when choosing a scale for your graph?
Risposta
(D)
Choosing a scale where each interval is easy to calculate
27
What happens to the apparent depth of an object in water?
Risposta
(C)
Looks shallower than the real depth.
28
Which color shift indicates an object moving away from the observer?
Risposta
(B)
Redshift
29
What is the name of the line drawn when we find new values from the graph?
Risposta
(C)
Extrapolation
30
When working in the lab, which action is a safe practice?
Risposta
(A)
Wearing a lab coat.
31
What are the units for the length of the wire?
Risposta
A
B
C
32
When you have a flammable liquid, what are important safety considerations?
Risposta
A
B
D
33
What does the letter 'V' stand for in the context of a circuit?
Risposta
(A)
Voltage
34
What is the primary means of identifying the expansion of the universe?
Risposta
(C)
Detecting the redshift of light from distant galaxies.
35
What is the correct way to measure the boiling point of water?
Risposta
(D)
Keep the thermometer in the water while taking the reading
36
What must be included when labeling the axes of a graph?
Risposta
(A)
The units of measurement
37
If you are looking at an experiment about the length of a wire, the independent variable will be?
Risposta
(C)
Length of the wire.
38
What is the formula that relates voltage, current, and resistance?
Risposta
(A)
V = I * R
39
A car with a mass of 1000 kg accelerates at 1 m/s² along a straight, flat road. What is the resultant force acting on the car?
Risposta
(C)
1000 N
40
The student measures the time for the pendulum to swing from A to C. Describe how the student determines this time as accurately as possible.
Risposta
A
B
C
41
What is the total resistance of the three resistors arranged in this combination?
Risposta
(C)
C = 0
42
Which sections appears to focus on planets?
Risposta
B
C
43
What is the approximate age of the universe, according to the Big Bang theory?
Risposta
(C)
13.8 billion years
44
What is the name of the phenomenon in which the wavelength of light is increased (shifted towards the red end of the spectrum) when the source is moving away from the observer?
Risposta
(B)
Red shift
45
What should you do if someone has been electrocuted?
Risposta
(B)
Immediately turn off the power supply
46
What is the acceleration of the motorcycle during the first 10 seconds?
Risposta
(C)
1 m/s²
47
Which section's title includes the word 'orbit'?
Risposta
(D)
11.4
48
Which of the following is an example of measuring time?
Risposta
(A)
A stopwatch
49
Which instrument is useful for drawing?
Risposta
(C)
Compass
50
Which of the following is found in the context of the Solar System?
