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Module 4 Electricity & Magnetism - Coggle Diagram
Module 4 Electricity & Magnetism
Electric Fields
Lines represent the direction of a standard charge
if placed into diagram
Positives to Negative
Strength of field is proportional to amount of field lines
Never cross lines
as they represent forces
Standard Charge
A single positive atom
Exact Opposite of an electron charge
Electric fields are
Electrostatic forces that are field forces
F= Eq
E
Electric field
NC-1
1/4πε0 x q/r^2
9x10^9 q/r^2
E∝ q/r^2
V/d
q
Charge
F
9 x10^9 x q1q2/r^2
Magnetism
Current Creates magnetic field
Field runs perpindicular to current (Right Hand Rule)
diagrams
dot is out of page
x is into page
Runs from North (+) to South (-) poles
Solenoids
coil of wire/current
concentrates magnetic field into middle
uniform field inside
weak magnetic field outside
Uniform mgnetic fields
Allows for uniform field strength
Magnetism derives from the spin/movement of electrons
if Electrons spin same way amplify field strength
Magnetic fields flows same way as electrostatic fields (Direction of movement for a test charge)
Circuits
Series
V=IR
Rt=R1 + R2 ... Rn
Parralel
V=IR
1/Rt= 1/R1 + 1/R2 ... 1/Rn
General
Battery -Ii-
Small side negative nerminal
V = IR
V
Voltage
Potential Energy Difference
W/q =
W = Fs = Eqs
= -U
IR =
I
The flow of Charged Particles
Charge per Unit time
Amps
V/R =
q/t =
Can only flow if
particles can move freely
a force is applied to move charge
There is a path
Conventional Current
Direction of Current a positive charge goes
R
Ratio of Potential Difference to Current
OHMS
IN I/V Graph = Gradient
all conductors have resistance
P
IV =
w/t =
Miscelaneous
Ferromagnetism
Magnetism due to Iron compounds
Permanant magnets
Electron spin fixed
Creation of semi permanat magnets
stroke metal specimen with permanent magnets to algin electron spins of the metal
using permant magnet to concentrate positive end of material
Resistor types
Electro magnetism
Magnets created by flow of current