EM: Electromagnets

Forces and Motion 9.3
Lesson 19. 
Electromagnets
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PhysicsSecondary EducationAge 13

This lesson contains 25 slides, with interactive quizzes, text slides and 1 video.

Items in this lesson

Forces and Motion 9.3
Lesson 19. 
Electromagnets
<page 360>

Slide 1 - Slide

How are you today?
😒🙁😐🙂😃

Slide 2 - Poll

Highlights of the Day
  • describe how to make an electromagnet and know that electromagnets have many applications
  • Values :  Responsibility and Determination

Slide 3 - Slide

Basic Concepts and Ideas

Slide 4 - Slide

A material is described as _____________ if it is attracted to a magnet.
A
electric
B
magnetic
C
repulsive

Slide 5 - Quiz

Magnetic materials include the metals i_____, n_______ and c________.

Slide 6 - Open question

Iron

Slide 7 - Slide

Nickel

Slide 8 - Slide

Cobalt

Slide 9 - Slide

S_____ is another common magnetic metal. It is a mixture that contains a large proportion of iron.

Slide 10 - Open question

Steel

Slide 11 - Slide

Magnetic materials can be ___________. It means turned into a magnet.
A
magnetised
B
brushed
C
cut

Slide 12 - Quiz

__________ magnets have a magnetic field that is always there. You cannot switch the magnetic field off and on again.
A
Permanent
B
Artificial

Slide 13 - Quiz

One way to magnetise a magnetic material is by using "electricity". When this method is used, the magnet is called an ________________.
A
ferromagnet
B
electromagnetic

Slide 14 - Quiz

Electromagnets

Slide 15 - Slide

Slide 16 - Video

Give ONE application of electromagnets in daily life.

Slide 17 - Open question

Slide 18 - Slide

Slide 19 - Slide

Electromagnets
  • An electromagnet is made by wrapping a wire around a magnetic material, such as iron. The wire that is wrapped around is a called a coil. The material in the middle of the coil is called the core.

Slide 20 - Slide

Slide 21 - Slide

Poles of an electromagnet
You can find out which pole is which in two simple ways.
  • Use a magnetic compass. A magnetic compass points along magnetic field lines, so will point towards the south pole.
  • Use a bar magnet with known poles. Opposite poles attract and like poles repel so, by bringing the bar magnet close to the electromagnet, you can detect which pole is which.

Slide 22 - Slide

Give one way how you can find out which pole is in an electromagnet.

Slide 23 - Open question

Slide 24 - Slide

Self-survey: Rate your level of understanding and participation in this lesson.
15

Slide 25 - Poll