Week 4 Term 3 2023

 Homework:

• Act 17A, p.192-194, Electric Fields
• Ex 6A, p.188-196, Static Electric Fields
• Act 18A, p.201 Intro DC Electricity
• Act 18B, p.207 Simpler Equivalent Circuits
• Act 18C, p.209 Potential Dividers
• Act 18D, p.211-213 Using Ohm's Law
• Ex 6B, p.200-201 Voltage and Current
• Ex 6C, p.205-214 D.C. Circuits
• Act 19A, p.219-220 Magnets
• Act 19B, p.223-225 F = BIL Lorentz
• Act 19C, p.228 F = Bqv Lorentz
• Ex 6D, p.218-220 F = BIL Lorentz
• Ex 6E, p.222-224 F = Bqv Lorentz
• Ex 6F, p.227-228 V = BvL Induced EMF
• Act 20A, p.231-232 Induction
• Act 20B, p.235-237 V = BvL Induction

Magnetic Fields






Magnets 

Electromagnet

Earth & Compasses - Magnetism





Electromagnet Used for Scrap Metal Crane



Levitating with Electromagnets


Exploding Cans with Electromagnets


Magnetic Fields




Right Hand Screw Rule





Right Hand Slap Rule



Right Hand Slap (Palm) Rule


Lorentz Force (F = Bqv)


Lorentz Force





Lorentz Force (F = BIL)




                                       





V = BvL

Note:
• emf is an old term for voltage and stands for electromotive force
• E is also used by enginers for Voltage (not energy)


D.C. Motor




D.C. Motor How it Works





Brushless D.C. Motor How it Works







Faraday Cage




Tesla Coil & Faraday Cage

Week 1 Term 3 2023

 Homework:

• Act 17A, p.192-194, Electric Fields
• Ex 6A, p.188-196, Static Electric Fields
• Act 18A, p.201 Intro DC Electricity
• Act 18B, p.207 Simpler Equivalent Circuits
• Act 18C, p.209 Potential Dividers
• Act 18D, p.211-213 Using Ohm's Law
• Ex 6B, p.200-201 Voltage and Current
• Ex 6C, p.205-214 D.C. Circuits

Current

Current is the rate of flow of Charge

I = Δq/Δt

Current

Voltage

Voltage (Potential Difference) is the change in energy (work done) to each coulomb of charge between two points on a circuit, or two points across an electric field

Circuit Symbols

Ohm's Law

Ohm's Law PhET application

D.C. Circuit Construction Kit PhET Application

D.C. Circuit Lab PhET Application

Ohm's Law

Series & Parallel Circuits

Series & Parallel Circuits

Electric Power

P = IV

P = I2R  ← using Ohm’s Law V=IR substitution

P = V2/R←using Ohm’s Law I=V/R substitution

D.C. Motor How it Works?

Week 9 Term 2 2023

 Homework:

• Act 17A, p.192-194, Electric Fields
• Ex 6A, p.188-196, Static Electric Fields

PhET - Charge & Electric Fields - App

Basics of Electric Charge

Definition of an Electric Field:

“Any region of space where a charge feels a force.”

A positive charge will feel a force with the electric field direction

A negative charge will feel a force against the electric field direction

Fe = Eq

Electric Field

Electric Potential (Voltage)

What is Voltage?

Uniform Electric Field

E = V/d

Uniform Electric Fields

Uniform Electric Field

E = V/d

E: Electric Field (Vm-1 or NC-1 depending on the context

used)

Electric Force

Fe = Eq

Fe: Electrical Force (N)

q or Q: Charge (C)

Electrical Potential Energy

As the charge falls through the Electric Field, the electrical potential energy transforms into kinetic energy.

Ek = Ep

½ mv2 = Vq

Electron Gun

(Cathode Ray Tube)

A Tube Screen TV is an Electron Gun

Cathode Ray Tube and how it works

Electron Gun

Cathode Ray Tube (CRT)

Discovery of the Electron: Cathode Ray Tube Experiment

Cathode Rays Leads to Thomson's Model of the Atom

Parker Solar Probe - Use of CRT

Millikan's Oil Drop Experiment

Charge of an Electron - Millikan's Oil Drop Experiment

Week 6 Term 2 2023

  Homework

• Act 15A, p.173-176 Models of the Atom and Radioactivity
• Ex 5A, p. 151-155 Models of the Atom
• Act 16A, p. 181, Nuclear Reactions
• Ex 5B, p.160-171 Radioactivity

Nuclear Reactions:

• Conservation of Atomic Number
• Conservation of Nucleon Number
• Conservation of Mass-Energy E = Δmc2

E = Δmc2

Nuclear Fusion in the Sun

Binding Energy comes from the change in mass from individual nucleons to being combined into a nucleus. This is energy lost by the nucleons joined together in a nucleus and must be returned in order to separate the nucleons

E = Δmc2

Element formation in Stars Nuclear Fusion

Binding Energy Per Nucleon

Mass Per Nucleon

Nuclear Reactions

Fission Fusion and Radioactive Decay

Fission & Fusion

Natural Nuclear Fission Reactor