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GCSE AQA Physics > Module 7 > Flashcards

Module 7 Flashcards

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1
Q

Where are the magnetic forces on a magnet strongest?

A

At the poles

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2
Q

What is a key characteristic of the poles of the magnet

A

Where the magnetic force is the strongest

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3
Q

What is the effect of bringing two like poles of a magnet together?

A

They repel

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4
Q

What is the effect of bringing two unlike poles of a magnet together?

A

They attract

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5
Q

Two magnets are brought together and they repel. Explain why this might be

A

It means that like poles were brought together

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6
Q

Two magnets are brought together and they attract. Explain why this might be

A

It means that unlike poles were brought together

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7
Q

What is the key characteristic of a permanet magnet?

A

That it produces is own magnetic field

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8
Q

What does it mean if an object produces its own magnetic field?

A

It is a permanent magnet

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9
Q

What is an induced magnet?

A

A material that becomes a magnet when it is placed in a magnetic field

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10
Q

An object has been placed in a magnetic field, making it also magnetic. What is this object?

A

An induced magnet

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11
Q

What type of force is always caused by induced magnetism?

A

Attractive force

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12
Q

An attractive force is always present with a magnetic object. What does this tell us about the magnetic object?

A

The object is an induced magnet

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13
Q

What happens when an inudced magnet is removed from the magnetic field?

A

It loses most/all of its magnetism quickly

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14
Q

A magnetic object is removed from a magnetic field, and loses it’s magnetism. What does this tell us about the magnetic object?

A

That it is an induced magnet

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15
Q

How can you separate a permanent magnet, induced magnet, and a non-magnetic object using a bar magnet?

A

The non-magnetic object will not be attracted to the bar magnet. The permanent magnet will be attracted to the bar magnet in one orientation, but the other. The induced magnet will always be attracted to the bar magnet

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16
Q

Define Magnetic Field

A

The region around a magnet where a force acts on another magnet or on a magnetic material

17
Q

What is the name given to the region around a magnet where a force acts on another magnet or magnetic material?

A

Magnetic Field

18
Q

Name four magnetic materials

A

Iron, Steel, Cobalt and Nickel

19
Q

What do iron, steel, cobalt and nickel all have in common?

A

They are all magnetic materials

20
Q

Describe the force between a magnet and a magnetic material

A

It is always a force of attraction

21
Q

What determines the strength of a magnetic field?

A

The distance away from the magnet. The closer to the magnet, the stronger the magnetic field

22
Q

What effects the direction of a magnetic field at any given point?

A

The direction is determined by the direction of the force that would act on another north pole placed at the point

23
Q

Describe the direction of the magnetic field around a bar magnet

A

The direction of the magnetic filed is from the north seeking pole of a magnet to the south seeking pole of the magnet

24
Q

Describe how to plot the magnetic field pattern of a magnet using a compass

A

Place the plotting compass at one end of the magnet, and draw a dot where the needle is pointing. Then move the compass so the back of the needle is where the dot was drawn, and put a new dot where the front of the needle is now facing, and repeat until you reach the other end of the magnet. Then draw a line joining up all the dots. Repeat for different starting points on the magnet.

25
Q

Draw the magnetic field patter of a bar magnet, showing how the strength and direction change from one point to another

A

Lines should be drawn from north pole to south pole, and be closest together at the poles, and be more spaced the further from the poles you travel. Use link below for images:

https://www.google.com/search?q=bar+magnet+magnetic+field&client=firefox-b-d&sxsrf=AOaemvK_idtjvqxtwUvapKSSi0_-s2cM9A:1643134880145&source=lnms&tbm=isch&sa=X&ved=2ahUKEwi77eS2ws31AhVtQEEAHdHJC3QQ_AUoAXoECAEQAw&biw=958&bih=949&dpr=1

26
Q

Explain how the behaviour of a magnetic compass is related to evidence that the core of the Earth must be magnetic

A

A compass will always point to the same point, no matter where you are, suggesting the earth has a magnetic field, and this would be caused by it’s core being magnetic

GCSE AQA Physics (2 decks)

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