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WorksheetsSimple Electric Charges
Total questions: 21
Worksheet time: 11mins
Name
Class
Date
1.
Which of the following statements is false?
a)
An object with fewer electrons than protons has a net positive charge
b)
Negative electrons orbit a positive nucleus full of protons
c)
Electrons can travel freely through any substance
d)
Different materials hold electrons with different strengths
2.
Why might someone wear anti-static clothing if they work with a lot of computers?
a)
So that they don't stick to their chair
b)
To make sure they don't get a shock when they touch metal
c)
To avoid building up charges that could damage hard drives
d)
To prevent static discharge from causing fires
3.
An electroscope is near a negative rod and is briefly grounded. When both the rod and grounding are removed, what occurs?
a)
The electroscope has a net positive charge
b)
The electroscope will end up neutral
c)
The electroscope has a net negative charge
d)
Nothing happens
4.
Which of the following is NOT a way that people can reduce electrostatic build up?
a)
Keep the humidity of the area high
b)
Coat surfaces with anti-static paint or clothing
c)
Ground objects to the Earth
d)
Put lightning rods on top of buildings
5.
Some clothes are pulled out of a dryer and they are all sticking together! What is causing this?
a)
Induced charge from friction
b)
Induced charge from contact
c)
Static charge from friction
d)
Static charge from contact
6.
Which of the following is NOT a practical application of electric charges?
a)
Monitoring radiation exposure
b)
Reducing pollution
c)
Static-cling
d)
All of these are practical applications
7.
Lightning bolts CANNOT travel in the following way:
a)
From a cloud to the Earth
b)
From the Earth to a cloud
c)
From one cloud to another
d)
Lightning can do all those things!
8.
What is an electrostatic series?
a)
Like the World Series: objects compete for electrons
b)
A series of events that create a static charge
c)
A list of materials arranged by strength of electron-holding
d)
A number to show how well an object conducts electrons
9.
Why is e-waste rarely recycled in Canada?
a)
It's dangerous - the heavy metals can leak into our water
b)
We're cheap - its a very expensive process
c)
We're lazy - we don't take our electronics to get recycled
d)
We're generous - we think other countries should have it
10.
How does a Van de Graaff generator produce a large charge?
a)
With a large belt that builds up charge through friction
b)
With a metal rod that is rubbed against a belt
c)
It is plugged into an electric socket which is where the charge comes from
d)
With small sparks travelling to where you touch the sphere
11.
Which of the following statements is FALSE?
a)
A neutral object is only attracted to negative objects
b)
A greater charge means greater attraction/repulsion forces
c)
Like charges always repel one another
d)
An induced charge can occur in a neutral object
12.
A lightning rod CANNOT do the following:
a)
Safely conduct lightning into the ground
b)
Reduce the overall electric charge in a cloud
c)
Prevent fires from lightning
d)
Reduce the chance of lightning hitting other objects
13.
The easiest way to remove a net static charge from a large object is:
a)
Touch it with your finger
b)
Touch it with a neutral object
c)
Touch it with an object that has an opposite charge
d)
Ground it to the Earth
14.
What are Electrostatic precipitators (ESPs) used for?
a)
They create precipitation by using electric charges
b)
They help solids precipitate from gases
c)
They can reduce pollution with electric charges
d)
They provide a smooth coat of paint to an object using charges
15.
Which of the following statements about "semi-conductors" is CORRECT?
a)
Their electrons cannot move easily from atom to atom
b)
Their electrons move more easily under certain conditions
c)
Their electrons can move easily between atoms
d)
Their electrons conduct electricity
16.
What helps photocopiers to create perfect images of scanned items?
a)
A toner that is positive charged
b)
A metal whose conductivity changes with light exposure
c)
A mirror that reflects light onto the toner
d)
Paper without a net charge
17.
Why does grounding an object to the Earth remove any net charge it may have?
a)
Because the Earth has a magnetic core
b)
Because the Earth has an atmosphere
c)
Because the Earth is huge
d)
What? None of these are right!
18.
How do static charges help a dosimeter function?
a)
Doses of radiation make the dosimeter fibers charged
b)
Electricity is generated when radiation energy enters
c)
Radiation exposure charges a small needle inside the dosimeter
d)
Radiation makes the gas inside conductive, which makes a fiber move in response
19.
Which of the following scenarios would create an induced charge?
a)
Touch a negative rod to a neutral pith ball
b)
Touch a positive rod to a negative pith ball
c)
Hold a positive rod next to a neutral pith ball
d)
Hold a negative rod next to a negative rod
20.
Glass holds onto electrons more loosely than silk. What happens if they are rubbed together?
a)
Electrons move from glass to silk and the glass becomes positive
b)
Electrons do not move
c)
Electrons move from silk to glass and the glass becomes negative
d)
Electrons move equally between the silk and the glass, so they stay neutral
21.
A man decides to take cover from a lightning storm under a tree (in a field). Which of the following is TRUE?
a)
He is safe from both rain and lightning
b)
Lightning could hit the tree but he would be safe
c)
Lightning could hit the tree and jump to him as it travels down
d)
Lightning could still hit him directly
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