Y2_T2_LSN2.3.A

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

HAVE READY:

Textbook & notebook closed

Macbook on KWIZL

Practice quiz on Kwizl:

• 8 min max practice quiz.
• 7 min max peer review and feedback.
• 5 min max write a reflection in your notebook:
• What mistakes did I make?
• Why were they mistakes?
• What can I do better next time?

TOPIC 2.3

ELECTRICITY

P. 70-77

§2.3 - Learning Goals:

P. 70-77

I can…:

• Explain what electrical energy is made of.
• Explain what current is, along with its unit of measurement.
• Explain what voltage is, along with its unit of measurement.

§2.3 - Key Words:

P. 70-77

• Electricity
• Electrons
• Electrical current (I)
• Ampères (A)
• Voltage (U)
• Volts (V)
• Voltage source
• Power (P)
• Watt (W)
• Energy consumption
• 
  
• 
  

Name different sources of electricity

What is an insulator?

1. a material that does not conduct electricity
2. a material that conducts electricity
3. a clamp to connect two electric wires
4. a electric source

§2.3 - What is electricity?

Electricity is caused by the flow of electrons moving through a conducting material

- Those electrons go from the power source to the device

- In the appliance they leave their energy behind

- They go back to the power source to be charged.

The plastic around the wire is an insulator (cable jacket and wire insulation)

The coper wire is a conductor (stripped wire)

phet.colorado.edu

Assignment 

Make the following circuits work in the app: "Inleiding"

• let a lightbulb burn with a battery
• let a lightbulb burn with a battery and a switch
• let 2 lightbulbs burn with a battery and a switch

There is a electrical current when...

1. the circuit is closed
2. when there is a electric source
3. when the wires are conductors
4. all three need to be true

§2.3 - Current

How many electrons flow past every second.

 

Measured in Amps (A) 

with an am-meter

§2.3 - Voltage

 How much electrical energy each electron is carrying. 

 

Measured in Volts (V) 

with a voltmeter

How many voltage is in an electric socket at your home?

§2.4 - Voltage 

The mains socket has a voltage of 220V 

This can be dangerous and even deadly

24V is the safe limit  

Transformers raise/lower voltage

What is the unit for electrical current?

1. V for Voltage
2. A for amps
3. W for Watts
4. v for Speed

What is the Voltage of a electrical socket in a house?

1. 360 V
2. 12 V
3. 230 V
4. 1500 V

What part of an atom makes it possible for electrical energy to trafel?

1. Proton
2. Nucleon
3. Muon
4. Electron

Homework for next time:

Lablesson:

• Make sure you have most of your data (at least 11 days) collected and ready to use in this lesson.
• Watch the instructional video on Google sheets.

Theory lesson:

• Complete the exercise of Topic 2.3 (p.74-75)
• Read Topic 3. (p. 72-73)
• Study the glossary of Topic 2.3 on Studygo.

Investigating electrical conductivity:

GET READY:

• your lab partner
• pen/pencil
• your labjournal