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Edexcel ScienceiGCSE Physics

V. Magnetism and Electromagnetism

2019-2020

Name:________________Physics Teacher:______________

House CG Test Score

Year 11

Specification Checklist

6.01 use the following units: ampere (A), volt (V) and watt (W)

6.02 know that magnets repel and attract other magnets and attract magnetic substances

6.03 describe the properties of magnetically hard and soft materials

6.04 understand the term magnetic field line

6.05 know that magnetism is induced in some materials when they are placed in a magnetic

field

6.06 practical: investigate the magnetic field pattern for a permanent bar magnet and

between two bar magnets

6.07 describe how to use two permanent magnets to produce a uniform magnetic field

pattern

6.08 know that an electric current in a conductor produces a magnetic field around it

6.09 describe the construction of electromagnets

6.10 draw magnetic field patterns for a straight wire, a flat circular coil and a

solenoid when each is carrying a current

6.11 know that there is a force on a charged particle when it moves in a magnetic

field as long as its motion is not parallel to the field

6.12 understand why a force is exerted on a current-carrying wire in a magnetic field, and

how this effect is applied in simple d.c. electric motors and loudspeakers

6.13 use the left-hand rule to predict the direction of the resulting force when a wire

carries a current perpendicular to a magnetic field

6.14 describe how the force on a current-carrying conductor in a magnetic field changes

with the magnitude and direction of the field and current

Magnetism and Electromagnetism – Science (Physics) 2

Key Words

Key Word Image Definition

Alternating Current (a.c.)

Current that repeatedly changes direction. This is what comes out of your plug socket.

Circuit Breaker A switch linked to an electromagnet that performs the same function as a fuse but more quickly. Can be reset and reused.

Direct Current (d.c.) Current that travels in a single direction. This is what is

used in batteries and most computers/phones.

Electromagnet A soft iron core wrapped in wire. When current flows through the coil it becomes magnetic.

Field Line An indication of the strength and direction of the magnetic field. The denser the lines the stronger the field.

Hard/Soft Magnetic Material

A measure of how quickly a material loses its magnetic properties over time. Soft materials become non-magnetic much faster than hard.

Iron CoreThe centre of an electromagnet. It boosts the power of a solenoid.

Left Hand Rule (Motor Effect)

The relationship between magnetic field direction, electrical current in a wire and the force on the wire while inside a magnetic field.

Magnetic Field An area where other magnetic objects experience a force of attraction and repulsion.

Magnetic Material A material that is attracted to a magnet or can be

magnetic. E.g. Iron, Nickel, Steel, Cobalt.

Permanent Magnet A hard magnetic material that will not lose its magnetism

over time.

Right Hand Rule

The relationship between current in a wire and the shape of the field around it.


SolenoidA coil of wire with electricity running through it. Produces a magnetic field similar to that of a bar magnet.

1: Magnetic Fields

Knowledge and Understanding Recap QuizUse the knowledge you have gained since Shell to answer the following questions

1. What is the mass of an object that weighs 2N on Earth?

……………… (2)

2. What is the law of conservation of energy?

…………………………………………………………………………………………………………………………………………………………………………………… (2)

3. What is the definition of a longitudinal wave?

…………………………………………………………………………………………

………………………………………………………………………………………… (2)

4. What is the purpose of the control rods in a nuclear reactor?

…………………………………………………………………………………………

………………………………………………………………………………………… (2)

5. If a 50N box has a base area of 3m2, what pressure is it putting down on the ground?

……………… (3)

6. What is the definition of frequency?

…………………………………………………………………………………………

………………………………………………………………………………………… (1)

7. A planet orbits the Sun in 567 days. It has an orbital radius of 70 000km. What is the

orbital speed of the planet?


(3)

Score [ /15]

Learning Outcomes:

1. Define what is meant by a ‘magnetic field’ 2. Describe an experiment to investigate the magnetic field pattern around a

bar magnet3. Sketch the shape and direction of the magnetic field around a bar magnet

including the direction.

Magnets and Magnetic Fields.

Key Ideas

1. Magnets are able to attract objects made from magnetic materials (e.g. iron, steel, nickel and cobalt)

2. Magnetism is induced in these magnetic materials when they are placed in a magnetic field.

3. Permanent magnets are made from magnetically hard materials (e.g. steel) which keep their magnetism once they have been magnetised.

4. The strongest part of a magnet are its poles, North and South,


5. Around every magnet there is a region of space where we can detect magnetism (where magnetic materials will be affected).

6. This is called the magnetic field and in a diagram we represent this with magnetic field lines.

7. The magnetic field lines should always point from north to south.


V1: Plotting Magnetic Field Lines

In this investigation you are going to use a compassto map the field lines around a bar magnet.

In what directions do the field lines point?

……………………………………………………………..

Method

1. Place your bar magnet in the centre of the next page and draw around it. 2. Place a compass at one pole of the bar magnet. 3. Draw a ‘dot’ to show there the compass is pointing, 4. Move the compass so the opposite end of the needle is pointing to the dot, 5. Repeat steps 3 and 4 until to reach the other pole of the magnet. 6. Do this procedure at least 5 times from different points on the pole of the magnet.

*Tip, try to be as accurate as possible when drawing your dots*7. Join up your dots to create your field line!


Health and Safety Check!

Keep any strong magnetsaway from electronicdevices.

Draw around your magnet and plot your field lines on this page.


Magnetic Field around a Bar Magnet

Key Ideas

1. Magnetic field lines never cross2. We illustrate stronger magnets by sketching the field lines closer together.3. Magnetic field lines always point from the north pole to the south pole of the magnet.


strong

weak

2: Attraction and Repulsion

Knowledge and Understanding Recap QuizUse the knowledge you have gained since Shell to answer the following questions

1. How much charge passes through a point in a circuit if a current of 5A flows of 35 seconds?

……………… (3)

2. What is the principle of moments?

…………………………………………………………………………………………………………………………………………………………………………………… (2)

3. What is 17K in oC?

…………………………………………………………………………………………

………………………………………………………………………………………… (1)

4. What are the three types of ionising radiation?

…………………………………………………………………………………………

………………………………………………………………………………………… (3)

5. A light ray is refracted through a block. An angle of incidence of 50o produces an angle

of refraction of 37o. What is the refractive index of the block?

……………… (3)

6. What is meant by the absolute brightness of a star?

…………………………………………………………………………………………

………………………………………………………………………………………… (1)

7. Sketch the magnetic field around the bar magnet below:

(2)

Score [ /15]


Learning Outcomes:

1. Describe the conditions under which magnets repel or attract2. Investigate the shape of the magnetic field during attraction and repulsion3. Describe the shape of a uniform magnetic field and under what conditions it

happens

Attraction and Repulsion

Key Ideas

1. If two poles of permanent magnets are put next to each other they will either repel or attract.

2. Similar poles (north-north or south-south) will repel each other. 3. Opposite poles (north-south) will attract each other.


V2: Plotting Magnetic Field Lines (Attract/Repel)

In this investigation you are going to use a compassto map the field lines between two magnets (once for attraction and once for repulsion)

What poles should be facing each other for repulsion?

……………………………………………………………..

What poles should be facing each other for attraction?

……………………………………………………………..

Method

1. Place your two bar magnets in the centre of the next page and draw around them.[Make sure the correct poles are facing each other].

2. Draw a ‘dot’ to show there the compass is pointing, 3. Move the compass so the opposite end of the needle is pointing to the dot, 4. Repeat steps 3 and 4 until to reach the other magnet or the end of the page. 5. Do this procedure at least 5 times from different points on the pole of the magnet.

*Tip, try to be as accurate as possible when drawing your dots*6. Join up your dots to create your field line!



Keep any strong magnetsaway from electronicdevices.

Draw around your magnet and plot your field lines on this page [ATTRACTION]


Draw around your magnet and plot your field lines on this page [REPULSION]


Magnetic Fields – Attraction and Repulsion

Key Ideas

1. When magnets are attracting we get a uniform magnetic field between the magnets. 2. A uniform magnetic field is comprised of straight, parallel lines which are evenly

spaced. 3. When magnets are repelling we get an area between the magnets where there are no

magnetic field lines at all.


Worksheet: Magnetic Field Lines

For all of the situations below, can you sketch the magnetic field? Don’t forget to include direction!

STRETCH STRETCH


3. Current, Magnetic Fields and Electromagnets

Knowledge and Understanding QuizUse the knowledge you have gained since Shell to answer the following questions

1. What is the acceleration of a 50kg object when experiences an unbalanced force of 650N?

……………… (3)

2. On the image below add:a. The shape of the magnetic field (1)b. The direction of the magnetic field (1)

3. What is the definition of current?

…………………………………………………………………………………………

………………………………………………………………………………………… (2)

4. If a submarine is 350m below sea level. What is the pressure experienced by the

submarine due to the sea water? [density of sea water is 1100kg/m3]

……………… (3)

5. What two conditions are required for TIR (total internal reflection) to occur?

…………………………………………………………………………………………

………………………………………………………………………………………… (2)

Score [ /12]


Learning Outcomes:

1. Understand that when an electric current passes through a conductor it produces a magnetic field around the conductor.

2. Sketch the shape and direction of the magnetic field around a conductingwire, flat circular coil and a solenoid.

3. Describe the construction of an electromagnet and explain what changes canbe made to alter its strength.

Magnetic Fields around a current carrying wire

Key Ideas

1. When current passes through a wire, a magnetic field is created around the wire. This is called electromagnetism.

2. The field around a wire is a circular shape. 3. We can determine the direction of the field using the right hand grip rule.


V3: Demo – Current and Field Shapes

Your teacher is going to demonstrate the shape of the fields around a flat circular coil and a solenoid.

In the space below make sure to sketch the direction and shape of the magnetic field you observe.

It is also important to include the direction of the current in your diagram.

Flat Circular Coil

How could you increase the strength of the magnetic field?

…………………………………………………..

…………………………………………………..

…………………………………………………..

…………………………………………………..

Solenoid

How could you increase the strength of the magnetic field?

…………………………………………………..

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…………………………………………………..

…………………………………………………..



Circular coils and solenoidcan get hot during use.Do not touch.

V4: Building and Testing an Electromagnet

In this investigation you are going to build a simple electromagnet using some insulated wire and an ironnail.

You will then test the effect of increasing the number of turns in your coil and increasing the current through your wire.

Method 1 – Number of coils

1. Wrap your insulated wire around your iron nail 10 times. 2. Connect your wire to a power supply as per the diagram below.3. Set the power supply to 2V4. Attempt to pick up some paper clips, record how many you pick up. 5. Increase the number of coils by 5. 6. Repeat steps 4 and 5 until you reach 40 coils.

Method 2 – Current

1. Wrap your insulated wire around your iron nail 20 times. 2. Connect your wire to a power supple as per the diagram below but now add an

ammeter in series. 3. Set the power supply to 1V4. Take a reading of current from the ammeter. 5. Attempt to pick up some paper clips, record how many you pick up. 6. Increase the voltage on the power supply by 1V. 7. Repeat steps 4-6 until you reach 6V.



Electromagnet should notbe left on for extendedperiods of time as it will get too hot.

Results


Number of coils Number of Paperclips

10

15

20

25

30

35

40

How did the number of coils affect the strength of your electromagnet?

…………………………………………………………………………………………………..

…………………………………………………………………………………………………..


Voltage [V] Current [A] Number of Paperclips

1

2

3

4

5

6

How did the current through the coil affect the strength of your electromagnet?

…………………………………………………………………………………………………..

…………………………………………………………………………………………………..


The Electromagnet

Key Ideas

1. An electromagnet is made by wrapping a coil of wire around an iron core and passing a current through it.

2. The core will then become magnetic as long as the current is flowing. 3. The core must be made of a magnetically soft material such as iron. 4. If you increase the number of turns in the coil around the core you make the

electromagnet stronger. 5. If you increase the size of the current passing through the wire you also make the

electromagnet stronger.


4. Flemings’ Left Hand Rule

Knowledge and Understanding QuizUse the knowledge you have gained since Shell to answer the following questions

1. Sketch the shape and direction of the magnetic field around the wire below.

(2)

2. Sketch a transverse wave below. (1)a. Label on the wavelength (1)b. Label on the amplitude (2)

3. How does the crumple zone on a car reduce the force on a passenger during a

collision?

…………………………………………………………………………………………

………………………………………………………………………………………… (1)

4. Sketch the I-V graph for a resistor.

(3)

5. What is the equation linking kinetic energy, mass and velocity?

…………………………………………………………………………………………

………………………………………………………………………………………… (1)

Score [ /11]

……………………………………………………………………………………………………………

……………………………………………………………………………………………………………

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Learning Outcomes:

1. Use the left hand rule to predict the direction of movement of a current carrying wire when it is perpendicular to a magnetic field.

2. Describe ways to increase the force this wire experiences.3. Understand that any charged particle will experience a force when moving

in a magnetic field except if travelling parallel to that field.

Flemings’ Left Hand Rule

Key Ideas

1. When a charged particle (such as an electron in a wire) moves through a magnetic field it experiences a force (unless it is travelling parallel to the field).

2. This is known as the motor effect. 3. When the direction of the current and the magnetic field are perpendicular to one

another we can predict the direction of this force. 4. We do this using the left hand rule.

a. Thumb – direction of forceb. First Finger – direction of fieldc. Second finder – direction of current.


V5: Investigating Force on a wire

In this investigation you are going to investigate what factors affect the force experienced by a current carrying wire in a magnetic field.

What two factors are you going to investigate?

1. ……………………………………………..

2. ……………………………………………..

In this investigation the method is written in the questions and will be underlined so it is vital that you work methodically through these.

V5: Method and questions

1. Set up your equipment as per the diagram above. Connect an Ammeter in series with the wire. Do not turn on the power supply. What happens to the wire?……………………………………………………………………………………………………….……………………………………………………………………………………………………….

2. Set your power supple to 1V and switch it on.

Record the reading on the Ammeter: …………..

What happened to the wire?

……………………………………………………………………………………………………….

……………………………………………………………………………………………………….

3. Increase the voltage of the power supply to 2V

Record the reading on the Ammeter: …………..


……………………………………………………………………………………………………….

……………………………………………………………………………………………………….



Do not leave current flowing through the wireon for too long – wire may overheat.

North

-+

MagnetsYoke

Wire

4. What is the link between current in the wire and the force on the wire?

……………………………………………………………………………………………………….

……………………………………………………………………………………………………….

……………………………………………………………………………………………………….

5. To increase the strength of the magnetic field add another magnet to each side of the yoke.


……………………………………………………………………………………………………….

……………………………………………………………………………………………………….

6. To increase the strength of the magnetic field further add two more magnets.


……………………………………………………………………………………………………….

……………………………………………………………………………………………………….

7. What is the link between the strength of the magnetic field and the force on the wire?

……………………………………………………………………………………………………….

……………………………………………………………………………………………………….

……………………………………………………………………………………………………….

8. Drawing on your knowledge from electromagnetism, can you suggest another way to

increase the force on the wire?

……………………………………………………………………………………………………….

……………………………………………………………………………………………………….

……………………………………………………………………………………………………….


Worksheet – Electromagnetism and Left Hand Rule

Q1.The diagram shows apparatus set up by a student.

Closing the switch creates a force that acts on the wire XY.

(a) (i) Explain why a force acts on the wire XY when the switch is closed.

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................(3)

(ii) The force causes the wire XY to move.Draw an arrow on the diagram above to show the direction in which the wire XY will move.

(1)

(iii) State the effect that this experiment demonstrates.

...............................................................................................................(1)

(b) The student replaced the battery with a low frequency alternating current (a.c.) power supply.

The student closed the switch.

(i) Describe the movement of the wire.

...............................................................................................................(1)


(ii) Give a reason for your answer to part (i).

...............................................................................................................

...............................................................................................................

...............................................................................................................(1)

Q2.(a) Some people wear magnetic bracelets to relieve pain.

Figure 1 shows a magnetic bracelet.

There are magnetic poles at both A and B.Part of the magnetic field pattern between A and B is shown.

Figure 1

What is the pole at A? ...........................................

What is the pole at B? ...........................................(1)

(b) Figure 2 shows two of the lines of the magnetic field pattern of a current-carrying wire.

Figure 2

The direction of the current is reversed.

What happens to the direction of the lines in the magnetic field pattern?

.......................................................................................................................(1)


(c) Fleming’s left-hand rule can be used to identify the direction of a force acting on a current-carrying wire in a magnetic field.

(i) Complete the labels in Figure 3.

Figure 3

(2)

(ii) Figure 4 shows:

• the direction of the magnetic field between a pair of magnets

• the direction of the current in a wire in the magnetic field.

Figure 4

In which direction does the force on the wire act?

..............................................................................................................(1)

(iii) Suggest three changes that would decrease the force acting on the wire.

1 ..........................................................................................................

2 ..........................................................................................................

3 ..........................................................................................................(3)


(d) Figure 5 shows part of a moving-coil ammeter as drawn by a student.

The ammeter consists of a coil placed in a uniform magnetic field.When there is a current in the coil, the force acting on the coil causes the coil to rotate and the pointer moves across the scale.

Figure 5

(i) The equipment has not been set up correctly.

What change would make it work?

..............................................................................................................

..............................................................................................................(1)

(ii) Figure 6 shows the pointer in an ammeter when there is no current.

Figure 6

What type of error does the ammeter have?

..............................................................................................................(1)


Score [ /18]

5: Motors and Loudspeakers

Knowledge and Understanding Recap QuizUse the knowledge you have gained in the topic so far to answer the following questions.

1. Sketch the shape and direction of the magnetic field around the following:

(4)

2. What is a uniform magnetic field?

…………………………………………………………………………………………………………………………………………………………………………………… (2)

3. Give one way to decrease the strength of an electromagnet.

…………………………………………………………………………………………

………………………………………………………………………………………… (1)

4. When will a charged particle not experience a force when in a magnetic field?

…………………………………………………………………………………………

………………………………………………………………………………………… (1)

5. Label the quantities represented by the fingers in Fleming’s Left hand rule.

(3)

6. In what direction will the wire move in each of the examples below:

(3)


Score [ /14]

Learning Outcomes:

1. Describe how a motor works using the left hand rule. 2. Describe how a loudspeaker works using the left hand rule.

V6: Demo - The Motor

Key Ideas

1. How is a Motor working? Current flows in the wire/coil. This creates a magnetic field around the wire/coil. This magnetic field interacts with the field from the permanent magnet. This produces a force on the wire/coil which moves the wire/coil.

2. In the diagram above: AB experiences upward force CD experiences downward force The coil rotates (clockwise)



Do not leave current flowing through the wireon for too long – wire/motor may overheat.

B

C

D

A

3. The split-ring commutator changes the direction of the current every half turn as it spins. This reverses the direction of the forces, allowing the coil to continue spinning.

V7: Demo - The Loudspeaker

Key Ideas

How is a loudspeaker working?

An alternating current from the source passes though the coils in the speaker. This current is constantly changing direction and magnitude This current creates a magnetic field around the coil This field interacts with the magnetic field from the permanent magnets Creating a constantly changing force on the coil.



Do not leave current flowing through the foilon for too long – foil may overheat.

Very strong magnet. Keep away from phonesand pacemakers.

https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwj8hv-vkvLeAhVLrxoKHd81AZgQjRx6BAgBEAU&url=https://www.electronics-tutorials.ws/io/io_8.html&psig=AOvVaw31d_riqGNP-GJHguulB03p&ust=1543322659001932

This causes the coil to vibrate in and out as the direction of the force changes, moving the cone

The cone causes vibrations which we hear as sound waves.


Worksheet – Loudspeakers and Motors

Q1. The photograph shows a simple d.c. electric motor.

(a) When the switch is closed the coil spins.Explain why this happens.

(3) .............................................................................................................................................

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(b) (i) Describe two ways to increase the speed of rotation of the coil in this motor.(2)

1.................................................................................................................................................

2.................................................................................................................................................

(ii) Suggest how to make the coil spin in the opposite direction.(1)

.............................................................................................................................................

.............................................................................................................................................


Q2. In the radio, sound is produced by a loudspeaker.

The diagram shows the construction of a loudspeaker.

Describe how a loudspeaker uses an electrical supply to produce sound waves.(5)

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Score [ /11]


Stretch Activity – The Electric Bell

Below is a diagram on an electric bell circuit.

Using the knowledge you have gained in the topic, can you explain how the bell works? You will need to link to hard/soft materials, electromagnets and magnetism.

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Stretch Activity – The Circuit Breaker

Below is a diagram of a circuit breaker.

Using the knowledge you have gained in the topic, can you explain how the circuit breaker works? You will need to link to hard/soft materials, electromagnets and magnetism.

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Magnetism and Electromagnetism

Past Paper Questions

Q1.

The photograph shows a plotting compass and a small bar magnet.


(a) Describe how you should use this apparatus to investigate the magnetic field patternof the bar magnet.

(3) .............................................................................................................................................

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(b) Add the magnetic field pattern of the bar magnet to the diagram below.(3)

(Total for question = 6 marks)


Q2.

(a) State what is meant by the term magnetic field line.(1)

.............................................................................................................................................

.............................................................................................................................................

(b) The diagram shows a cross-section through a wire placed between two magnetic poles.

The wire carries electric current into the page at X.

The shape of the magnetic field is shown.

(i) Add arrows to any two lines to show the direction of the magnetic field.(1)

(ii) Draw an arrow on the diagram to show the direction of the force on the wire.Label this arrow F.

(2)

(c) Describe the magnetic field in the region inside the dotted square.(2)

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Q3.

A magnetic field pattern can be shown using lines.

(a) The diagram shows some magnetic field patterns.

Which pattern shows a uniform magnetic field? Explain your answer.(2)

Pattern........................................................................................................................................

Explanation................................................................................................................................

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(b) Explain how to produce a uniform magnetic field.(3)

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Q4.

Some students are investigating a simple electric motor.

(a) When the switch is closed the coil spins on the axle.State why.

(2) .............................................................................................................................................

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(b) State two changes that would make the motor spin faster.(2)

1 ................................................................................................................................................

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2 ................................................................................................................................................

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Q5.

The diagram shows a piece of card and two wide bar magnets.

(a) (i) Add to the diagram to show the shape and direction of the magnetic fieldpattern between the magnets.

(3)(ii) Describe how to investigate the shape and direction of the magnetic fieldbetween the magnets.

(3) .............................................................................................................................................

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(b) A metal rod, X Y, is placed in a magnetic field as shown.

Wires from a cell are connected to the ends of the rod so that there is a currentfrom X to Y.

(2)Describe the effect on the rod. .............................................................................................................................................

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Magnetism and Electromagnetism

Spec Point Notes

Magnetism and Electromagnetism Specification Notes

6.01 use the following units: ampere (A), volt (V) and watt (W)

6.02 know that magnets repel and attract other magnets and attract magnetic substances


6.03 describe the properties of magnetically hard and soft materials

6.04 understand the term magnetic field line

Around every magnet there is a region of space where we can detect magnetism (where magnetic materials will be affected).

This is called the magnetic field and in a diagram we represent this with magnetic field lines.

The magnetic field lines should always point from north to south.

6.05 know that magnetism is induced in some materials when they are placed in a magnetic

field

When magnetic materials

are bought near or touch the pole of

a strong or permanent magnet, they

become magnets. This magnetic

character is induced on the objects

and it is removed when the permanent

magnet is removed.


https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjnwZ3IuPLeAhXixoUKHdtCAEAQjRx6BAgBEAU&url=https://slideplayer.com/slide/8369070/&psig=AOvVaw0_lYSIEz5V2SSdC0J5o3T0&ust=1543334869573746

6.06 practical: investigate the magnetic field pattern for a permanent bar magnet and

between two bar magnets

[see practical’s on pages 6 and 11]

Single bar magnet:

Between magnets:

6.07 describe how to use two permanent magnets to produce a uniform magnetic field

pattern

A uniform magnetic field is comprised of straight, parallel lines which are evenly spaced.

6.08 know that an electric current in a conductor produces a magnetic field around it


https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjfu5jFufLeAhVrxYUKHQZxCosQjRx6BAgBEAU&url=https://classnotes.org.in/class-10/magnetic-effects-of-electric-current/magnetic-field-and-field-lines/&psig=AOvVaw1sgiGg64-2shFYVl42zSPu&ust=1543335065289678

https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjs5pjmufLeAhUM4YUKHda3BN0QjRx6BAgBEAU&url=https://www.ece.neu.edu/fac-ece/nian/mom/work.html&psig=AOvVaw2Y4ZefkgtmtzbmovSDYViT&ust=1543335177925338

https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjQtP3bufLeAhVP5IUKHUD3A8wQjRx6BAgBEAU&url=https://www.ece.neu.edu/fac-ece/nian/mom/work.html&psig=AOvVaw2Y4ZefkgtmtzbmovSDYViT&ust=1543335177925338

https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjt2I2YuvLeAhWm4IUKHTlCD0sQjRx6BAgBEAU&url=https://gcsehelpblog.wordpress.com/tag/6-7-describe-how-to-use-two-permanent-magnets-to-produce-a-uniform-magnetic-field-pattern/&psig=AOvVaw2G_jYteuE9wyoovuToFGxK&ust=1543335306120632

https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwiSmeiuuvLeAhVPrxoKHaI1B88QjRx6BAgBEAU&url=https://serc.carleton.edu/details/images/46549.html&psig=AOvVaw3xNIaiFaZY6Gj8v2CThrbT&ust=1543335343511481

6.09 describe the construction of electromagnets

6.10 draw magnetic field patterns for a straight wire, a flat circular coil and a

solenoid when each is carrying a current


https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwivsaXMuvLeAhUD1RoKHdwEBkMQjRx6BAgBEAU&url=http://www.schoolproject.in/electromagnet-science-project/&psig=AOvVaw1LuaYDu5p1vai2PQ1lod3d&ust=1543335391943531

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https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjv08TguvLeAhUCQBoKHdMWDD8QjRx6BAgBEAU&url=http://physicsed.buffalostate.edu/SeatExpts/resource/rhr/rhr.htm&psig=AOvVaw3_wNsFLtuFr6ZpFQDtkhZ3&ust=1543335445850331

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6.11 know that there is a force on a charged particle when it moves in a magnetic

field as long as its motion is not parallel to the field

6.12 understand why a force is exerted on a current-carrying wire in a magnetic field, and

how this effect is applied in simple d.c. electric motors and loudspeakers

Please see pages 31 and 32 for model answers for this spec point.

6.13 use the left-hand rule to predict the direction of the resulting force when a wire

carries a current perpendicular to a magnetic field

6.14 describe how the force on a current-carrying conductor in a magnetic field changes

with the magnitude and direction of the field and current

If you increase the magnitude of the current through a wire or the size of the

magnet being used, you increase the force on the wire.

If you change the direction of the current or reverse the poles of the magnet,

you change the direction of the force on the wire


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