Magnetism

Magnetism

Grade 8

• Recognise what is magnet and the force

• Identify the properties of a magnet

• Explain what is the magnetic field

• Define the direction of a magnetic field

• Linking an effect of magnetic in the current

• Find out a magnetism in daily life

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Learning objectives

Open Ended

Based on your understanding, how can you say the object is a magnet?

​What is magnet?

"An object which is capable of producing magnetic field and attracting unlike poles and repelling like poles."

"There is a magnetic force when a magnet attracts the magnetic materials"

Discussion

If in a magnetic there is a force, how can you define the magnetic force?

"Magnetic Force can be defined as the force that can attract magnetic materials, attractive or repulsive force that is exerted between the poles of a magnet, and electrically charged moving particles."

Open Ended

In the previous slide, there is a statement of "electrically charged moving particles". What's kind of moving particles in electricity that able to conduct magnetic force?

The magnetic field always comes out of the north pole to the south pole.

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​REMEMBER...

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Multiple Choice

Is it true, the magnet that is hard to magnetize also hard to be magnetized

• Yes

• No

It's true.

The material that is hard to magnetize also hard to be demagnetize

Open Ended

Why can we add soft iron to increase the strength of an electromagnetic?