electroscopes particle picturescharge 100 200 400 300 500 100 200 300 400 500
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electroscopesParticle pictures Charge
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500 500
Particle Pictures for 100
• What is the charge on this object? How do you know?
Solution
Particle Pictures for 100 Solution
The object has more electrons than protons so it is negatively charged
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Particle Pictures for 200
What are 3 things we know about this object?
Solution
Particle Pictures for 200 Solution
• Neutral• Insulator• Polarized
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Particle Pictures for 300
Please draw the mystery object on the left, it has 6 atoms in it.
Solution
Mystery Object
Is a conductor
9 Electrons
Particle Pictures for 300 Solution
• Mystery object is a conductor• It must be positively charged for the neutral
object to be attracted to it
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Particle Pictures for 400
Please draw these particle pictures
Solution
3 electrons, insulator9 electrons, conductor
FAR APART
NEAR
FAR APART AFTER CONTACT
Objects in their initial positions
Particle Pictures for 400 Solution
NEAR
FAR APART AFTER CONTACT
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Particle Pictures for 500
Please draw these particle pictures
Solution
4 electrons, conductor
FAR APART
NEAR
FAR APART AFTER CONTACT
Objects in their initial positions, they are CONDUCTORS
16 electrons, conductor
10 electrons 10 electrons
Particle Pictures for 500 Solution
NEAR
FAR APART AFTER CONTACT
10 electrons 10 electrons
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Charge for 1001) What types of objects can transfer their charge by contact?2) What types of objects can NOT transfer their charge by contact?
Solution
Charge for 100 Solution
1) Conductors – electrons move easily in and out of their atoms
2) Insulators – electrons do NOT easily move in and out of their atoms
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Charge for 200
What are the 3 particles that make up an atom and what are their respective charges?
Solution
Charge for 200 Solution
Protons – Positive chargeElectrons – Negative chargeNeutrons – No charge
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Charge for 300
What Charge could the mystery object have?
Solution
Neutral O
bjectMystery Object
Charge for 300 Solution
The electrons in the Neutral Object are attracted to the mystery object, therefore the mystery object must be positively charged.
Neutral O
bject
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Charge for 400
What charge could the mystery object have?
Solution
Positi
vely
Cha
rged
Obj
ect
Mystery Object
Charge for 400 Solution
The mystery object could be negative or neutral as the electrons in the positively charged balloon are being repelled by the electrons in the mystery object
Or Neutral
Positi
vely
Cha
rged
Obj
ect
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Charge for 500
Please draw the mystery object with 8 atoms.Is there more than one correct answer? explain
Solution
Mystery object
Is an insulator NEAR
Charge for 500 Solution
Neutral Positive
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OR
Electroscopes for 100Solution
FACT - This electroscope is Neutral
Why is the needle/straw of this electroscope rotated? What is the term we use to describe this electroscope?
Positively Charged Object, near but not in
contact
Electroscopes for 100 Solution• The electrons move up
to the top of the electroscope leaving the bottom positively charged, so the needle rotates
• We say this electroscope is polarized
Positively Charged Object, near but not in
contact
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Electroscopes for 200
What two things do we know about this electroscope?
Solution
Electroscopes for 200 Solution
• The electroscope is Neutral because the needle is not rotated
• It is also not polarized
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Electroscopes for 300
What do we know about the charged object?What do we know about the mystery object?Do these objects have anything in common?
Solution
A charged object is placed on top of the electroscope and is moved
FAR AWAY.
A mystery object is then BROUGHT NEAR the electroscope and the result
is shown below.
Electroscopes for 300 Solution
1. The charged object is a conductor2. The mystery object is charged opposite of the charged object.3. We can not determine the material of the mystery object
because it has not contacted the electroscope
A charged object is placed on top of the electroscope and is moved
FAR AWAY.
A mystery object is then BROUGHT NEAR the electroscope and the
result is shown below.
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Electroscopes for 400
Solution
A charged object is placed on top of the electroscope and is moved FAR
AWAY.
A mystery object is then IN CONTACT with the electroscope and
the result is shown below.
What do we know about the charged object?What do we know about the mystery object?Do these objects have anything in common?
Electroscopes for 400 Solution
A charged object is placed on top of the electroscope and is moved FAR
AWAY.
A mystery object is then IN CONTACT with the electroscope and
the result is shown below.
1. The charged object is a conductor2. The mystery object is charged the same as the charged object3. We can not determine the material of the mystery object
because it is still in contact with the electroscope
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Electroscopes for 500
Solution
All objects are FAR
away
A positively charged
object is in contact
All objects are
FAR AWAY AGAIN
A mystery object is
in CONTACT
All objects are
FAR AWAY AGAIN
1. What type of object was the positively charged object?2. What TWO things do we know about the mystery object?3. Explain your answers!
Electroscopes for 500 Solutions
All objects are FAR
away
A positively charged
object is in contact
All objects are
FAR AWAY AGAIN
A mystery object is
in CONTACT
All objects are
FAR AWAY AGAIN
1. The positively charged object is a conductor because it transfers its charge to the electroscope
2. The mystery object is positively charged and an insulator because the electroscope indicated an increased SAME charge and it did not transfer its charge to the electroscope
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