2-1 Producing electrical energy (2.2)

• Natuurkunde
• Middelbare school
• vwo
• Leerjaar 3

Producing 

electrical energy (blz. 62)

Stationary

- Writingbook and iPad

- Pen, pencil and geotriangle

- Calculator

Schoolbags in

the cupboard

Phones in the phone bag

Bluetooth 

- ON

- VPN off

Lesson goals:

• Explain how electricity is generated.
• Explain how a dynamo works.
• Explain what is meant with induced- and alternating current.
• Use the formulas

                                               and

                to calculate the unknown values.

P=U⋅I

E=P⋅t

Nuclear power

Enegry is generated by splitting the nuclei of atoms.

https:

Dynamo

Induction

If the magnetic field changes in a coil, 

there is a potential difference on the ends of the 

coil. This is called induction.

The generated potential difference

is called induced current.

Alternating current

Power

U is potential difference in (V)

I is current in (A)

P is power in watt (W)

P=U⋅I

Electrical energy

P is power in watt (W)

t is time in seconds (s)

E is Energy in joule (J)

E=P⋅t

E=P⋅t

             Do the following

          15, 16 and 17 digitally