Warm up 12.01.08

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Warm up 12.01.08

• Take an Anchor Question from the gray tray and
  glue it in your notebook.
• You will need a new sheet for the C-notes.

2
Goals for today

• Announcements
• Electricity Intro Charges
• Anchor Questions
• Reflection

3
Topic Electrical Charges

• Electrical Charge is a property of matter.
• Examples of properties of matter
• Water- boiling point, freezing point, density

4
Topic Electrical Charges

• Electrical Charge is a property that allows an
  object to exert force on another object without
  touching it.

5
Topic Electrical Charges

• Electrical Charge is related to atoms and their
  particles
• Electrons are negative
• Protons are positive

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Topic Electrical Fields

• Electrical Field is the space around which an
  object can exert a force
• The force is stronger nearer the object.
• The force is stronger is the charge is large.

7
Topic Electrical Fields

• Electrical Field is the space around which an
  object can exert a force
• The force is stronger nearer the object.
• The force is stronger is the charge is large.

8
Topic Electrical Fields

• Electrical Field is the space around which an
  object can exert a force
• The force is stronger nearer the object.
• The force is stronger is the charge is large.

9
Topic Electrical Fields

• Electrical Field is the space around which an
  object can exert a force
• The force is stronger nearer the object.
• The force is stronger is the charge is large.

10
Brain Break 1

• Ask the person next to you
• What was the favorite dish you had during the
  break?

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Topic Static Charge

• Static Charge is the buildup of electric charge
  in an object caused by the presence of many
  particles with the same charge
• Example
• Balloon and hair
• Balloon and paper

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Topic Static Charge

• Opposites attract. And likes repel.

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Topic Static Charge

• Charging objects can be done two ways
• Charging by contact
• Charging by induction

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Topic Static Charge

• Charging objects can be done two ways
• Charging by contact- charges move when the
  objects TOUCH

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Topic Static Charge

• Charging objects can be done two ways
• Charging by induction- charges move without TOUCH

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Topic Static Charge

• Charge Polarization is the process of separating
  opposite charges within an object. The positive
  charge becomes separated from the negative
  charge.

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• Diagram the electric field lines for the
  following configuration of two objects. Place
  arrows on your field lines.

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• Which is an example of polarization?

19
Respond to the following student statement "A
positively charged object is an object which has
an excess of positive electrons."

• Opposites attract. And likes repel.

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Topic Charge Movement

• Static Charges have Potential Energy.
• Potential Energy is stored energy.

21
Topic Charge Movement

• Static Charges have Potential Energy.
• Potential Energy is stored energy.
• Electric Potential is the amount of electric
  potential energy that a unit of charge has at a
  certain position in an electric field.
• Electric Potential is measured in Volts

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Topic Charge Movement

• Charges can move only if there is a DIFFERENCE in
  electric potential.

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Topic Charge Movement

• Charges can move only if there is a DIFFERENCE in
  electric potential.

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Examples of Charge Movement

• Static Shock
• Opposites attract. And likes repel.

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Examples of Charge Movement

• Lightning
• Opposites attract. And likes repel.

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• Opposites attract. And likes repel.

27
Several electric field line patterns are shown in
the diagrams below. Which of these patterns are
incorrect? _________ Explain what is wrong with
all incorrect diagrams.                         
                                                  
                                 
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Several electric field line patterns are shown in
the diagrams below. Which of these patterns are
incorrect? _________ Explain what is wrong with
all incorrect diagrams.                         
                                                  
                                 
Answer C, D and E In C, the lines are directed
towards a positively charged object. In D, the
lines are not symmetrically positioned despite
the fact that the object is a symmetrical
sphere. In E, the lines are directed away from a
negative charge.
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• Opposites attract. And likes repel.