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electrosco pes Particle pictures Charge 100 200 4 00 3 00 5 00 100 100 200 200 3 00 3 00 4 00 4 00 5 00 5 00

Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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Page 1: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

electroscopesParticle pictures Charge

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Page 2: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Particle Pictures for 100

• What is the charge on this object? How do you know?

Solution

Page 3: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Particle Pictures for 100 Solution

The object has more electrons than protons so it is negatively charged

Home

Page 4: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Particle Pictures for 200

What are 3 things we know about this object?

Solution

Page 5: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Particle Pictures for 200 Solution

• Neutral• Insulator• Polarized

Home

Page 6: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Page 7: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Particle Pictures for 300 Solution

• Mystery object is a conductor• It must be positively charged for the neutral

object to be attracted to it

Home

Page 8: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Page 9: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Particle Pictures for 400 Solution

NEAR

FAR APART AFTER CONTACT

Home

Page 10: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Page 11: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Particle Pictures for 500 Solution

NEAR

FAR APART AFTER CONTACT

10 electrons 10 electrons

Home

Page 12: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Page 13: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Home

Page 14: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Charge for 200

What are the 3 particles that make up an atom and what are their respective charges?

Solution

Page 15: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Charge for 200 Solution

Protons – Positive chargeElectrons – Negative chargeNeutrons – No charge

Home

Page 16: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Charge for 300

What Charge could the mystery object have?

Solution

Neutral O

bjectMystery Object

Page 17: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Home

Page 18: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Charge for 400

What charge could the mystery object have?

Solution

Positi

vely

Cha

rged

Obj

ect

Mystery Object

Page 19: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Home

Page 20: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Page 21: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Charge for 500 Solution

Neutral Positive

Home

OR

Page 22: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Page 23: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Home

Page 24: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Electroscopes for 200

What two things do we know about this electroscope?

Solution

Page 25: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

Electroscopes for 200 Solution

• The electroscope is Neutral because the needle is not rotated

• It is also not polarized

Home

Page 26: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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.

Page 27: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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.

Home

Page 28: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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?

Page 29: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Home

Page 30: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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!

Page 31: Electroscopes Particle picturesCharge 100 200 400 300 500 100 200 300 400 500

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

Home


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