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Course: Alhussan Physics — Stage 7
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Alhussan Physics — Stage 7

Chapter 1: Energy

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Chapter 2: Forces

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Chapter 3: Sound

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Chapter 4: Electricity

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Chapter 5: The Earth in Space

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Quiz

Physics 4.1 Charging up — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Which term matches this definition? “Pull together; opposite charges attract.”
Attract
Absorption
Insulator
Eardrum
2.
Static shocks reported by humidity. At what value of "Humidity (%)" is "Shocks per week" smallest?
Dr Dabour Hub Academy - figure 1
80
40
60
20
3.
Which statement is NOT correct?
Static builds up on metals easily.
A polythene rod rubbed with wool becomes negative.
Like charges repel.
An object that loses electrons becomes positive.
4.
True or false? A rubbed balloon sticks to a wall.
True
False
5.
Pieces of paper picked up by a rubbed comb. What is the value of "Pieces" when "Number of rubs" is 20?
Dr Dabour Hub Academy - figure 2
11
12
6
10
6.
Like charges ____.
cancel
attract
repel
ignore
7.
Distance a charged balloon bends water. Calculate the percentage change in "Deflection (mm)" from 1 to 5.
Dr Dabour Hub Academy - figure 3
−900%
90%
−90%
10%
8.
An acetate rod rubbed with a cloth becomes ____.
negative
magnetic
positive
neutral
9.
A balloon gains 2 million electrons per rub. After 10 rubs?
12 million
200 million
20 million
5 million
10.
Which is the correct definition of “Attract”?
Reflected sound.
Carried by electrons in wires.
Component that lights when current flows.
Pull together; opposite charges attract.
11.
Which statement is NOT correct?
Dust sticks to TV screens because of static.
An acetate rod rubbed with a cloth becomes positive.
An object that gains electrons becomes negative.
Like charges attract.
12.
Static shocks reported by humidity. At what value of "Humidity (%)" is "Shocks per week" smallest?
Dr Dabour Hub Academy - figure 4
60
40
80
20
13.
Which statement is NOT correct?
Sparks are magnetic.
An object that loses electrons becomes positive.
A charged balloon can bend a stream of water.
Charges are measured in coulombs.
14.
Which is the correct definition of “Positive charge”?
Metal rod carrying lightning safely to earth.
A wave of vibrations that needs a medium.
Absorbs sound and reduces echoes.
Charge from losing electrons.
15.
True or false? Static is never dangerous.
True
False
16.
True or false? Electrostatic force gets stronger with distance.
True
False
17.
Static shocks reported by humidity. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 5
A
B
C
D
18.
Static shocks reported by humidity. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 6
A
B
C
D
19.
Charge on rods after rubbing (relative). Which has the greatest value?
Dr Dabour Hub Academy - figure 7
Acetate
Glass
Polythene
Metal
20.
Shocks fell from 12 to 2 per week. Percentage decrease?
83%
10%
500%
17%
21.
Shocks fell from 10 to 6 per week. Percentage decrease?
4%
40%
60%
67%
22.
An object has 200 protons and 210 electrons. Net charge?
−10
410
10
200
23.
Which statement is NOT correct?
Two charged balloons attract.
Charge is not created by rubbing.
Static is a problem when filling aircraft with fuel.
Only electrons move when objects are rubbed.
24.
Static shocks reported by humidity. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 8
A
B
C
D
25.
Charge on rods after rubbing (relative). What is the value for Metal?
Dr Dabour Hub Academy - figure 9
−8
6
0
5
26.
Pieces of paper picked up by a rubbed comb. At what value of "Number of rubs" is "Pieces" smallest?
Dr Dabour Hub Academy - figure 10
25
10
5
20
27.
Which statement is correct?
Sparks are magnetic.
Static builds up on insulators.
Rubbing creates charge.
Like charges attract.
28.
Static shocks reported by humidity. What is the value of "Shocks per week" when "Humidity (%)" is 40?
Dr Dabour Hub Academy - figure 11
0
2
6
14
29.
An object has 100 protons and 190 electrons. Net charge?
100
290
90
−90
30.
A balloon gains 10 million electrons per rub. After 20 rubs?
200 million
2 million
30 million
2000 million
31.
Charge is not ____ by rubbing.
moved
stored
created
transferred
32.
True or false? Protons move when objects are rubbed.
True
False
33.
Which is the correct definition of “Static electricity”?
Metal fork that vibrates at one pitch.
Wire completing the circuit in a plug.
Pull together; opposite charges attract.
Charge built up on an insulator by rubbing.
34.
An object has 200 protons and 190 electrons. Net charge?
390
200
10
−10
35.
True or false? Like charges repel.
True
False
36.
Which statement is correct?
Rubbing creates charge.
Static builds up on metals easily.
Static is never dangerous.
Charges are measured in coulombs.
37.
Shocks fell from 10 to 3 per week. Percentage decrease?
30%
70%
233%
7%
38.
Which is the correct definition of “Discharge”?
Charge flowing away, sometimes as a spark.
Thin membrane that vibrates when sound arrives.
Reflected sound.
1/1000 of an amp.
39.
Distance a charged balloon bends water. Which statement best describes the pattern?
Dr Dabour Hub Academy - figure 12
"Deflection (mm)" stays the same
"Deflection (mm)" rises to a peak at 1, then falls
"Deflection (mm)" increases as "Distance from water (cm)" increases
"Deflection (mm)" decreases as "Distance from water (cm)" increases
40.
Pieces of paper picked up by a rubbed comb. At what value of "Number of rubs" is "Pieces" greatest?
Dr Dabour Hub Academy - figure 13
10
15
25
5
41.
Which term matches this definition? “Charge built up on an insulator by rubbing.”
Static electricity
Longitudinal wave
Echolocation
Sonar
42.
Distance a charged balloon bends water. Between which two values of "Distance from water (cm)" did "Deflection (mm)" change the most?
Dr Dabour Hub Academy - figure 14
1 and 2
3 and 4
2 and 3
4 and 5
43.
Electrostatic force ____ with distance.
stays
doubles
weakens
strengthens
44.
Pieces of paper picked up by a rubbed comb. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 15
A
B
C
D
45.
Static shocks reported by humidity. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 16
A
B
C
D
46.
Dust sticks to TV screens because of ____.
magnetism
gravity only
static
wind
47.
An object that loses electrons becomes ____.
neutral
positive
negative
heavier
48.
Distance a charged balloon bends water. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 17
A
B
C
D
49.
True or false? Gaining electrons gives a positive charge.
True
False
50.
Pieces of paper picked up by a rubbed comb. Calculate the percentage change in "Pieces" from 5 to 25.
Dr Dabour Hub Academy - figure 18
600%
−500%
83%
500%
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Part of Chapter 4: Electricity — see every lesson and quiz in this unit.
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