Lesson 3

• Physics
• Middelbare school
• vwo
• Leerjaar 3

TTO 3 — Physics

Chapter 1. Electricity

TTO 3 — Physics

Chapter 1. Electricity

This lesson

• Recap
• Practice exercise
• Discussing the homework
• Start section 2

Recap

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).

Discussing the homework

Section 1.

Exercise 3, 4, 5, 6 & 8

Section 2

Transporting electrical energy

Link

Homework

Section 2

Read section 2 - The electricity grid

Do section 2 - Exercise 1 and 2