20.1 Understanding Magnetism

20.1 Understanding Magnetism

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Starter Activity

Brainstorming 😄

Open Ended

Can you name some everyday objects that rely on magnets to work?

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Learning check-point 1 😎

Properties of Magnets and Magnetic Field

Multiple Choice

Polarity of magnets:

What happens when you bring two South Poles close?

• Repel

• Attract

Multiple Choice

Where do the magnetic field lines start and end?

• They start at south poles and end at north poles

• They start at north poles and end at south poles

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Learning check point 2 😎

Virtual Experiment [Part 1]

Open Ended

Based on your experiment, what can you say happened when we put a magnetic field through a wire?

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Learning check point 2 😎

Virtual Experiment [Part 2]

Multiple Choice

What happened to the light bulb when we had more loops in the solenoid?

• It became brighter! Current increased

• It became dimmer! Current decreased

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Learning check point 3 😎

Right Hand Rule [Current in a Wire]

Multiple Choice

A steady current flows in a straight wire to the right. Choose the correct magnetic field lines around the red point.

Multiple Choice

A steady current flows in a straight wire.

The direction of the current is suddenly reversed.

What happens to the magnetic field?

• Direction of the magnetic field reverses.

• Strength of the magnetic field decreases.

• Strength of the magnetic field increases.

• The magnetic field stays the same.

Multiple Choice

A steady current flows in a straight wire.

Gradually, the current in the wire is increased.

What happens to the magnetic field when the current increases?

• Strength of the magnetic field increases.

• The magnetic field stays the same

• Strength of the magnetic field decreases

• Direction of magnetic field reverses

Plenary

That's enough Magnetism for today😋

Open Ended

Any questions?

20.1 Session 2

Time to say bye bye to this section

Learning check point 😎

Permanent Magnet vs Temporary Magnet

Multiple Choice

What do we call the atoms in a magnet that act as tiny magnets?

• Magnetic Domain

• Dipole

Multiple Choice

Individual dipoles tend to clump with other dipoles forming larger dipoles called domains.

These domains have a weaker magnetic fields than individual dipoles

• True

• False

Multiple Choice

How can we transform a temporary magnet to permanent magnet?

• by exposing a temporary magnet to a very strong external electric field.

• by exposing a temporary magnet to a very strong external magnetic field.

Multiple Choice

What happens every time we cut a magnet in half?

• It becomes non-magnetic because it disrupts the dipole alignment

• It is divided into smaller magnets with their own North and South Poles

Multiple Choice

Which picture illustrates the correct domain alignment of a non-magnet?

Multiple Choice

How can we create a ferromagnet?

• Is a material that can become a permeant magnet

• Is a type of chcolate

• Is a material that can be created by a low source of magnetic field

Plenary

That's enough Magnetism for today😋

Open Ended

Any questions?