Lesson 2 — Static electricity

• Nask
• Middelbare school
• havo, vwo
• Leerjaar 2

Elecricity

Static electricity

This lesson

• Quick recap – Static electricity
  
• Overview period 4
• The Homework assignment
• Electric circuits

Learning goals

•  You can explain in your own words what is meant by static electricity.
• You can explain in simple terms what electricity is.
• You can explain how an electric circuit works.
• You can draw a circuit diagram in the correct way

The learning goals P4

Learning goals P4

• Explain what electricity is in simple terms.
  

• Name the two types of charges and how they interact with each other. 
  

• Explain what is meant by an electric circuit, and be able to draw circuit diagrams.
  

• Explain what is meant by current, voltage and resistance in your own words.
  

• Describe the relationship between current, voltage and resistance.
  

• Explain what is meant by power and be able to do calculations on power. 
  

The paragraphs we will cover in period 4

• §9.1 electrostatic phenomena
  
• §9.4 Electric circuits
  
• §9.5 Current
  
• §9.6 + §9.7 + §9.8 Electric circuits
  
• §9.9 Voltage
  
• Extra material about Resistance
  

What is expected of you?

• Study the paragraphs.
  
• Make several worksheets

• Do one or two practicals.
  
• Learn two new formula's.
  
• Do the homework.
• Ask questions if you don't understand something.

The homework assignment

• Ancient Greeks observed: A piece of amber, when rubbed with fur can pick up pieces of straw.  
  
• The word for amber was 'Electron'. This effect is where the word electricity comes from.
  
• In 1600 William Gilbert found out other objects can do the same. He called these electrics, they poses the quality of electricity. Sometimes electrics repel, sometimes they attract.
  
• Benjamin Franklin likened the effect of electrifying and de-electrifying to charging and discharging a gun.  
  
• When many discharging devices are combined you get a larger shock. This was the start of the invention of the battery.
  

• Later the discovery of electrons explain what was really going on.
  
• Objects that are positively charged lack electrons.
  
• Objects that are negatively charged gained electrons.
  

Electricity is:

the flow of electrons from a negatively charged object to a positively charged object.

Electric circuits

Link

Exercise

a) Draw a circuit diagram for the circuit in the image below

b) Draw a circuit diagram for the circuit of a doorbel with a light that turns on when the bell is rings. 

Homework

• Watch the following two video's
  

• Do the workbook exercises of 

paragraph 9.1 and paragraph 9.4

Learning goals

•  You can explain in your own words what is meant by static electricity.
• You can explain in simple terms what electricity is.
• You can explain how an electric circuit works.
• You can draw a circuit diagram in the correct way