KGT 5.4 Vermogen

5.4. Power
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Slide 1: Slide
NatuurkundeMiddelbare schoolvmbo k, gLeerjaar 2,3

This lesson contains 16 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 45 min

Items in this lesson

5.4. Power

Slide 1 - Slide

What do you know about section 3?

Slide 2 - Mind map

Power
The amount of electrical energy that a dievice consumes is called power.


The unit of energy is joules per second (J/s). 

An other unit is watt
(W). 

 1 W = 1 J/s. 

Slide 3 - Slide

Power- ID plate
A dril of 300 watt, won't drille a hole as easy as a drill with 800 watt

Appliances with more power, are more powerful

More power, more use of electrical energy

So the bigger the power, the higher your energy bill

Een typeplaatje vind je vaak achterop of onderop een elektrisch apparaat.Op het typeplaatje vind je het vermogen van een apparaat.

Slide 4 - Slide

Power calculations
P= Power
U= Voltage
I= Current

Slide 5 - Slide

What is energy consumption?
the amount of anergy that transforms into an other energy per second.
Symbol: P
untit: watt (w)

Slide 6 - Slide

Conversion

Slide 7 - Slide

Methode
1. Given
2. Asked
3.Solution
Asignment 1
timer
3:00
Calculate the power of the fan.

Slide 8 - Slide

1. Given
                         Voltage= U = 230 V
                         Current= I = 0,35 A
2. Asked
                           Power = P
3. Solution

         P=U x I
         P=230 x 0.35
         P= 80.5 W

Slide 9 - Slide

Energy consumption calculate
E = P x t 

E = Energy consumption in kWh

P = Energie (power) in KiloWatt

t = time in hours

Slide 10 - Slide

Energy = power x time. A washer of 1000W is doing the wash in 1 hour and 30 minutes. Calculate the energy consumption in kWh
A
E= 1000 : 1.5 = 666.7 kWh
B
E= 1000 x 1.5 = 1500 kWh
C
E= 1 x 1.5 = 1.5 kWh
D
E= 1 x 1.30 = 1.3 kWh

Slide 11 - Quiz

What is de unit of energy
A
E
B
P
C
kWh
D
kW

Slide 12 - Quiz

What is de unit of current
A
Amp
B
Power
C
volt
D
watt

Slide 13 - Quiz

U is the symbol for?
A
Curent
B
Voltage
C
Resistance
D
Power

Slide 14 - Quiz

How do you formulate the current in a lightbulb of 2 amps.
A
U = 2 A
B
P = 2 A
C
t = 2 A
D
I = 2 A

Slide 15 - Quiz

A refrigerator consumes 0.6 kWh. What does it cost if you keep it on for 1 year. 1 kWh costs €0.25.
A
Costs= 0.6kWh x €0.25 = €0.15
B
Costs= 0.6kWh x €0.25 = €0.15 x 365 = €54,75
C
Costs= 0.6kWh / €0.25 = €2.40
D
Costs= 0.6kWh / €0.25 = €2.40 x 365 = €876

Slide 16 - Quiz