Lesson 2

Chapter 1 Electricity

Section 1: Generating electrical energy

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This lesson contains 17 slides, with text slides.

Lesson duration is: 45 min

Items in this lesson

Chapter 1 Electricity

Section 1: Generating electrical energy

Slide 1 - Slide

Chapter 1 Electricity

Section 1: Generating electrical energy

This lesson

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

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Discussing the homework

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Section 1: Generating electricity

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Electric induction

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Electrical power

P o w e r = \frac{​ E n e r g y ​ ​}{​ t i m e ​}

P = \frac{​ E ​ ​}{​ t ​}

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).

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Homework

Section 1, Exercise:

3, 4, 5, 6, 8

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Lesson 2

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