Lesson 2

• Physics
• Middelbare school
• vwo
• Leerjaar 3

Chapter 1 Electricity

Section 1: Generating electrical energy

Chapter 1 Electricity

Section 1: Generating electrical energy

This lesson

• Discussing the homework
• A power station
• Induced voltage
•  Electrical power
•  Working on exercise

Discussing the homework

Section 1: Generating electricity

Electric induction

Electrical power

Power=​time​​Energy​​

P=​t​​E​​

New physical quantity:

Power

Unit of power:

• Watt (W) (Joule/second)
  
• Kilowatt (KW) (kilojoules/second)

Formula

• P: power (Watt) (W)
  
• E: energy (Joule) (J)
  
• t: time (seconds) (s)
  

The amount of energy something generates or uses per unit of time.

Example: An LED light has a power

of 9 watts (It uses 9 joules per second).

Homework

Section 1, Exercise: 

3, 4, 5, 6, 8