In deze les zitten 17 slides, met interactieve quizzen, tekstslides en 1 video.
Onderdelen in deze les
Forces and Motion 9.3
Lesson 20.
Investigating Electromagnets
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Slide 1 - Tekstslide
How are you today?
😒🙁😐🙂😃
Slide 2 - Poll
Highlights of the Day
investigate factors that change the strength of an electromagnets
Values : Responsibility and Determination
Slide 3 - Tekstslide
RECALL OF THE PREVIOUS LESSON
Slide 4 - Tekstslide
Electromagnets
Three things that are needed to make an electromagnet:
a coil of wire
a magnetic core inside the coil
an electric current flowing in the coil.
Slide 5 - Tekstslide
Slide 6 - Tekstslide
Factors affecting the strength
of an electromagnet.
A factor is another word for a variable that will affect something.
Slide 7 - Tekstslide
Factors affecting the strength
of an electromagnet.
The number of turns in the coil. The more turns in the coil, the stronger the electromagnet.
The material of the core. Iron and some types of steel in the core make the strongest electromagnets.
The current in the coil. The greater the current, the stronger the electromagnet.
Slide 8 - Tekstslide
What will you do to increase the strength of the electromagnet?
Increase the number of turns on the coil.
Use more cells to increase the current.
Use a soft iron core in place of a steel core.
Slide 9 - Tekstslide
Increase the number of turns on the coil.
1
Slide 10 - Tekstslide
Use more cells to increase the current.
2
Slide 11 - Tekstslide
Use a soft iron core in place of a steel core.
3
Slide 12 - Tekstslide
Is soft iron really soft?
YES
NO
NOT SURE
Slide 13 - Poll
Is SOFT iron really soft?
Soft iron is not soft in the same way as modelling clay is soft. Soft iron is the term used foriron that is easily magnetisedand also easily demagnetised.
Demagnetised means it has lost its magnetism.
Slide 14 - Tekstslide
SUMMARY OF THE UNIT
Slide 15 - Tekstslide
Slide 16 - Video
Self-survey: Rate your level of understanding and participation in this lesson.