Summary

Summary A level Physics - Magnetism

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Course
Unit 4 PHYA4 - Fields and Further Mechanics

Institution
AQA

These are highly detailed that I complied over two years of studying this subject. Since I took notes like crazy, no area is left untouched so everything is there if you are struggling to understand a concept or equation. They are colourful, organised and neat, so perfect for the eye to understand.

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Uploaded on August 26, 2024
Number of pages 17
Written in 2024/2025
Type Summary

physics
maths
a level physcis
a level maths
a level physics
magnetsim

Study Level
A/AS Level
Examinator
AQA
Subject
Physics
Unit
Unit 4 PHYA4 - Fields and Further Mechanics

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Year 2 Physics

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1. Summary - A level physics - gravitation
2. Summary - A level physics - electric fields and capacitance
3. Summary - A level physics - further mechanics
4. Summary - A level physics - magnetism
5. Summary - A level physics - thermal
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Magnetism

,23rd October 2023
and
Magneric fieldfeeStrength
magnenc Density
B
Symbol is
·

·
Unit =
Tesla (t) or NA'mY

Definition :

unit
magnetic flux density is the
force per unit current per
length
on a
current-carrying wire in a
magnetic field .

They Always :

- ⑳0 from Worth -s South
·
Represent
Have direction
a
stronger find the close
they
are

· =

Vectors /

·
compasses line up with
field lines
.

- A compass North points in same direction as

field Lines .

Electromagnets
·
Most common is a solenoid

coil is diametre
greater length
than

↓
creates a space of a

uniform gidl
.

To
Increase
strength :
·
Increase arrest
no
encrease
of coils

of magnetically soft'
Insert
· iron care

· Recrease diametre

Convential current
-s Direction
>
of
Positive
movement
of positive
charge
negative .
-

, 3D Representation

-Thinke
⑨ of a dot

coming ,
away
from you
.

out
of
the
Page
↓ Inno the
Page
perpendicular to
it

magnetic field
·
Applies no and current .

Permeability
of ability of
the
I the measure a

material to support the
formation
magnetic field
it
of
a within

Increasing electromagnet strength
:

-
soft :on care means :

High permeability
C

· Easier
for magnetic field to be set up in material
· 200 ,
000
of space/air
X

Force field
on a
current-carrying
wire in a
Magnetic
Field :
Uniform Magnetic
·

Magnetic flux density constant
· field lines parallel
field lines
evenly spaced
· .

Effect of increasing distance

magneric flux density reduced
.

Fe on avewcayina
a

-

·

Magnetic field and face are
Always perpendicular to each .
other

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