Y2_T2_LSN2.3.B

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Slide 1: Slide
ScienceMiddelbare schoolhavo, vwoLeerjaar 2

This lesson contains 15 slides, with interactive quizzes and text slides.

Items in this lesson

HAVE READY:
Textbook & notebook closed
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Slide 1 - Slide

Practice quiz on Kwizl:
timer
20:00
  • 8 min max practice quiz.
  • 7 min max peer review and feedback.
  • 5 min max write a reflection in your notebook:
  • What mistakes did I make?
  • Why were they mistakes?
  • What can I do better next time?

Slide 2 - Slide

TOPIC 2.3

ELECTRICITY
P. 70-77

Slide 3 - Slide

§2.3 - Learning Goals:
P. 70-77
I can…:
  • Calculate the power a device uses with the help of the formula P= U • I.
  • Calculate the amount of energy a device uses with the help of the formula E = P • t.
  • Explain how energy consumption depends on both the power of a device and the time it's used. 


Slide 4 - Slide

§2.3 - Key Words:
P. 70-77
  • Electricity
  • Electrons
  • Electrical current (I)
  • Ampères (A)
  • Voltage (U)
  • Volts (V)
  • Voltage source
  • Power (P)
  • Watt (W)
  • Energy consumption


Slide 5 - Slide

§ 2.3 - Power
The power of a device is the amount of energy it uses every second.

The power is measured in Watts (W)
Watts is also J/s (joules per second)

Slide 6 - Slide

§ 2.3 - Power
Power can be calculated with the formula:
P = U x I 

  • P for Power (in W)
  • U for Voltage (in V)
  • I for current (in A)

Slide 7 - Slide

Energy
Power
Time
Voltage
current
I
P
U
E
t

Slide 8 - Drag question

J
W
s
V
A
I
P
U
E
t

Slide 9 - Drag question

The formula is P = U x I
Witch of these is also correct?
A
U = I / P
B
U = P x I
C
U = P / I
D
U = P + I

Slide 10 - Quiz

A device has a battery of 12 V. There is a current going through the device of 5 A. What is the power of this device?

Slide 11 - Open question

A telephone has a 15 V battery. Its power in low energy mode is 45 W.
What is the current in the telephone?

Slide 12 - Open question

A water boiler takes 3 minutes to heat the water. It has a power of 2000 W.
How much energy did the boiler use.
A
6000 J
B
667 J
C
0,015 J
D
360000 J

Slide 13 - Quiz

Homework for next time:
Lablesson:
  • Make sure you have most of your data (at least 14 days) collected and ready to use in this lesson.
  • I have made at least 3 graphs and have them ready in my spreadsheet or google docs.
Theory lesson:
  • Complete the exercise of Topic 2.3 (p.76-77)
  • Read Topic 2.4 (p. 78-81)
  • Study the glossary of Topic 2.4 on Studygo.

Slide 14 - Slide

Circuits simulation part 1:
GET READY:

  • your Macbook
  • Go to KWIZL
  • close all other programs

Slide 15 - Slide