2T electricity 4.2

Electricity
§2  Voltage sources
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Electricity
§2  Voltage sources
Welcome!

Slide 1 - Diapositive

Homework from last time
2, 3, 4, 6, 7, 8

Slide 2 - Diapositive

Learning objectives
  • You can explain what voltage is.
  • You can explain what a voltage source is.
  • You can calculate the combined voltage of connected batteries. 

Slide 3 - Diapositive

What do you still remember about 'electrical current'?

Slide 4 - Carte mentale

What is voltage?

Slide 5 - Diapositive

What is voltage?
We measure voltage in Volts (V) with a Voltmeter.

Slide 6 - Diapositive

What is voltage?
We measure voltage in Volts (V) with a Voltmeter.

A voltage source delivers a 
voltage to an electrical device
--> example: batteries!

Slide 7 - Diapositive

Connecting batteries

Slide 8 - Diapositive

Mains voltage
The voltage out of electrical sockets is always 230V!

Slide 9 - Diapositive

Mains voltage
The voltage out of electrical sockets is always 230V!

This voltage is called the mains voltage.

Slide 10 - Diapositive

Mains voltage
The voltage out of electrical sockets is always 230V!

This voltage is called the mains voltage.

For reference: A battery has a voltage 
below 24V --> Transformers.

Slide 11 - Diapositive

Working on the exercises
Read: p. 124 - 126
Make: 3, 4, 6, 7, 8
Not finished? --> Homework!

Slide 12 - Diapositive